How SellChecker Works
From search to sourcing decision in seconds. Here's how we help you know before you buy.
STEP 01
Search any item
Type in a brand, product, model, or category. Be as specific as possible for the best results — include size, color, condition, or year.
"Nike SB Dunk Jarritos Size 10" • "Vintage Pyrex Mixing Bowls" • "KitchenAid Artisan Mixer Red"
STEP 02
We analyze the market
SellChecker pulls real-time data from eBay — both active listings and recently sold items. We combine the official eBay API with sold listing data to calculate how quickly items are actually selling.
Active listings tell us supply. Sold listings tell us demand. The ratio between them is your sell-through rate.
STEP 03
Get your verdict
Based on the sell-through rate, you get a clear verdict so you can decide in seconds whether to source that item.
High demand, items are selling fast. Source with confidence.
Solid demand. Good item to pick up at the right price.
Moderate demand. Could sell, but check the price and competition.
Low demand or oversaturated. Probably not worth your money.
STEP 04
Deep-dive with Pro tools
Pro users unlock powerful tools to analyze even further before making a sourcing decision.
Deal Calculator
Enter your buy price, fees, and shipping to see exact profit margins
Comp Check
Visual grid of real eBay listings to compare pricing and competition
STR Slider
Drag to see how sell-through rate changes with different listing counts
Save & Export
Build a searchable portfolio and export to CSV for tracking
STEP 05
Source smarter, every time
Build up your search history, track your wins, and develop an eye for what sells. SellChecker remembers your searches so you can reference past lookups and spot patterns over time.
Ready to try it?
Search any item for free — no account required. 5 free searches per day.