A Practical Buyer's Guide

Anyone can get lucky on a marketplace once. But consistently finding listings that are genuinely underpriced — not just cheap, but actually worth more than what's being asked — is a skill. It's built from understanding how markets work, how sellers price, and how to evaluate a listing quickly and accurately.

This guide covers the practical framework experienced marketplace buyers use to identify great deals, avoid overpriced listings, and steer clear of the scams and duds in between.

Step 1: Know What Something Is Actually Worth Before You Search

This is the foundation everything else rests on. You cannot recognize a great deal if you don't know the market value of what you're buying. And market value isn't what sellers are asking — it's what buyers are actually paying.

Check Sold Listings, Not Asking Prices

On eBay, you can filter search results by "Sold" listings to see actual completed transaction prices. This is the single most reliable source of real market data for most used goods categories. A seller asking $800 for a laptop is asking. A sold listing showing the same model consistently closing at $550 is the market telling you what it's worth.

Facebook Marketplace and Craigslist don't show sold listings, which makes them harder to benchmark. Cross-reference with eBay sold data before evaluating listings on those platforms.

Check Multiple Platforms Simultaneously

Market value varies by platform. The same used iPhone might list for $600 on Facebook Marketplace, $550 on eBay, and $580 on Craigslist — or the inverse. Checking a single platform gives you a fraction of the picture. Checking all of them gives you the real range.

MyBuy surfaces listings from Facebook Marketplace, Craigslist, eBay, AutoTrader, Cars.com, and Amazon in a single search, which means you see the full cross-platform price range immediately rather than building it manually across tabs.

For Vehicles, Use Dedicated Pricing Tools

Used vehicle pricing is more complex than most categories because condition, mileage, trim level, accident history, and regional demand all affect value significantly. Canadian Black Book and AutoTrader's pricing guide are the standard references for Canadian buyers. For US cross-border purchases, Kelley Blue Book is the equivalent.

Know the realistic private sale price and dealer retail price for your target vehicle before you look at a single listing. Those two numbers define the range within which every listing you see should fall.

Step 2: Read the Listing Like a Buyer, Not a Browser

Most buyers skim listings. Experienced buyers read them. There's a significant difference in what you catch.

Specific Descriptions Signal Genuine Sellers

A seller who writes "purchased new in March 2023, used daily for 18 months, battery replaced in October 2024, minor scuff on bottom right corner, all original accessories and box included" knows their item. They've owned it, they remember it, and they're being transparent about its condition.

A seller who writes "good condition, works great, no issues" is giving you nothing. This isn't necessarily a red flag — some sellers are just terse — but it means you need to ask more questions before committing.

Vague Titles Are Opportunity

A listing titled "old laptop" is going to get far less traffic than one titled "Dell XPS 15 2022 i7 16GB 512GB SSD." If the item in the photos matches something valuable and the price is low, a vague title is your friend — it means fewer competing buyers have found it.

Search for these listings deliberately. Use broader terms, alternate descriptions, and common misspellings of high-value items. The deals hiding in plain sight behind bad titles are some of the best available.

Check What Questions Have Been Asked

On platforms that show buyer-seller message history or comments, read them. If multiple people have asked the same question — "does it still have the original receipt?" or "has it been in an accident?" — and the seller hasn't answered, that tells you something. A transparent seller answers questions. An evasive one often has something to hide.

Step 3: Evaluate the Photos Critically

Photos are the closest thing to physically inspecting an item before you see it in person. Most buyers look at them to confirm the item exists. Experienced buyers look at them to learn everything they can.

Original Photos vs. Stock Photos

Genuine seller photos are taken in real environments — a living room, a garage, a driveway. The lighting is imperfect. There are shadows, backgrounds, context. Stock photos are clean, professionally lit, and generic. If the photos in a listing look like they came from a product page, they probably did.

Stock photos in a peer-to-peer listing are a serious red flag. The seller is either not in possession of the item or is deliberately misrepresenting its condition. MyBuy's fraud detection flags listings where images appear to be stock photos rather than original seller photography — one of the platform's core safety features.

What Good Photos Show

A genuine seller photographing a used item in good faith will typically show: the item from multiple angles, any damage or wear they've disclosed, serial numbers or identifying information if relevant, and the accessories or extras included in the sale. If a listing shows only one photo from one angle of a high-value item, ask for more before proceeding.

Photo Consistency

Check that the item in the photos matches the description. If the listing says "minor scratch on left side" and the photos show significant damage on multiple surfaces, the seller's definition of minor and yours may differ considerably. If photos are inconsistent with each other — different backgrounds, different lighting, items that don't quite match — that's worth questioning.

Step 4: Understand the Pricing Signals

Not all below-market pricing is a great deal. And not all above-market pricing is a bad one. Understanding why something is priced the way it is matters more than the number itself.

Why Good Deals Are Priced Low

Legitimate below-market pricing usually comes from one of a few places: a motivated seller who prioritizes speed over maximum return, a seller who doesn't know the item's value, a listing that's been up long enough that the seller has lowered their price to generate interest, or an item with a genuine flaw that makes it worth less than comparable examples in better condition.

All of these are legitimate reasons for a low price and represent real buying opportunities — as long as you've verified the reason for the discount.

Why Suspicious Pricing Is Different

A price that is implausibly low — not 20% below market, but 60% or 70% below — with no obvious explanation is a warning sign. Electronics, vehicles, and luxury goods listed at a fraction of their market value without a compelling reason (salvage title, broken screen, missing parts) warrant serious scrutiny before you engage.

MyBuy labels listings as "Suspiciously Low" when pricing falls far enough below estimated market value to warrant caution. This isn't a guarantee of fraud — occasionally motivated sellers price aggressively — but it's a prompt to look more carefully before proceeding.

The Deal Quality Spectrum

Think of every listing as falling somewhere on a spectrum from "great deal" to "overpriced," with fair market value in the middle. MyBuy's AI assigns each listing a deal quality label — Great Deal, Fair Price, Overpriced, or Suspiciously Low — based on cross-platform price analysis. This gives you instant context on where a listing sits relative to the market, without having to build that picture manually.

Step 5: Verify Before You Commit

A listing that looks great on the screen still needs to hold up to scrutiny before money changes hands.

Ask the Right Questions

Before meeting a seller or making an offer, ask: Why are you selling? How long have you owned it? Has it had any repairs or modifications? Are there any issues I should know about? What's included in the sale?

A genuine seller answers these questions directly and consistently. Evasive, vague, or inconsistent answers are information too — just not the kind you want to hear.

For Vehicles: Get a Pre-Purchase Inspection

A used vehicle purchase without an independent mechanical inspection is a gamble regardless of how good the listing looks. A pre-purchase inspection from a qualified mechanic typically costs $100–$200 and can identify issues that would cost thousands to repair. Any seller who refuses to allow an inspection is telling you something important.

Always run a CARFAX or CarProof report on a Canadian vehicle before purchase. Accident history, odometer discrepancies, salvage or rebuilt titles, and lien information are all things you need to know before you buy — and none of them are visible from the listing.

Meet Safely

For in-person transactions, meet in a public place during daylight hours. Many Canadian police services offer their parking lots specifically as safe exchange zones for marketplace transactions. For high-value purchases, bring someone with you. Pay via a method that gives you recourse — not cash sent in advance to someone you've never met.

What a Great Deal Actually Looks Like

Putting it all together: a genuine great deal is a listing where the price is meaningfully below verified market value, the seller's description is specific and transparent, the photos are original and consistent with the description, the seller answers questions directly, and the condition of the item on inspection matches what was represented online.

That combination is rarer than buyers hope and more common than sellers realize. The buyers who find it consistently are the ones who do the homework before they search — not after they've already fallen in love with a listing.

MyBuy's deal scoring, fraud detection, and cross-platform price analysis are built to surface that combination faster — giving you the context you need to make smart decisions without spending hours building it manually.

Start your search at mybuysearch.com.

— Ian Cameron, Co-founder & CEO, MyBuy Software Inc.