How to Check eBay Profit Before You Buy Stock

For resellers, profit is made (or lost) when you buy, not when you sell. Once you've paid too much for stock, no amount of good listing will fix it. This guide shows how to work out the maximum price you should pay for an item before you buy it, whether you source from thrift stores, garage sales, clearance aisles or wholesalers.

Examples use US rates for most categories (13.6% plus $0.40 per order), from our calculator, last checked on September 25, 2026.

The maximum buy price formula

For an item you'll sell with free shipping in most categories, without a Store:

Maximum buy price = expected sale price × 0.864 − $0.40 − postage − packaging − your profit target

The 0.864 is what you keep after eBay's 13.6% final value fee, and the $0.40 is the per-order fee.

Example: you expect an item to sell for $35. Postage and packaging will cost $6, and you want at least $10 profit.

$35 × 0.864 − $0.40 − $6 − $10 = $13.84

Our calculator confirms it: bought at $13.84 and sold at $35, you make exactly $10.00. Pay less and you make more; pay more and you fall short of your target.

Step by step: checking an item in the store

1. Look up sold prices on the eBay app for the same item in similar condition. Use a realistic figure from the middle of the range, not the best-ever sale.
2. Estimate postage from the item's size and weight when packed. Heavy or bulky items can cost more to ship than they're worth.
3. Apply the formula or put the numbers into our US eBay fee calculator on your phone.
4. Compare with the price tag. Buy only if the price is at or below your maximum.

It takes a minute, and after a while you'll do it almost automatically for the categories you know.

Adjust for your category and setup

The 0.864 figure is for most categories without a Store. Swap in your own rate:

• Books, movies and music (15.3%): use 0.847.
• Basic Store, most categories (12.7%): use 0.873.
• Guitars and basses (6.7%): use 0.933.
• Athletic shoes at $150 or more (8%, no per-order fee): use 0.92 and leave out the $0.40.

Category makes a real difference. An item selling for $120 with $50 of costs makes $51.24 as a book or DVD box set, but $61.56 as a guitar, because of the different rates. Our complete fee guide lists every category rate.

If you plan to promote the item, add your ad rate too. At a 5% ad rate in most categories, use 0.814 instead of 0.864. Our Promoted Listings guide explains how the ad fee works.

Build in a safety margin

Things don't always go to plan. Items sell for less than expected, sit for months, get returned or arrive damaged. Protect yourself by:

• Using conservative sale prices: the typical sold price, not the highest.
• Checking how often it sells: an item that sells once a year ties up your money far longer than one that sells daily.
• Setting a minimum profit per item that makes the time worth it. Many resellers won't buy anything that can't make a set minimum, however cheap it is.
• Being careful with sale prices drawn from a few listings. Look for items with a clear, consistent sales history.

Red flags when sourcing

• Heavy, bulky or fragile items where postage eats most of the value.
• Cheap items where the per-order fee and postage leave almost nothing. See eBay fee mistakes to avoid.
• Branded goods you can't authenticate, which risk returns, disputes and account problems.
• Items missing parts that buyers expect, like chargers, cables, manuals or boxes.
• Restricted or prohibited items that eBay doesn't allow.

From one item to a sourcing strategy

Once you're checking profit on every purchase, start tracking which categories and sources give you the best results. Over time, concentrate on the categories where you know values well and margins are healthy. Our profit margin guide explains how to compare items using margin and ROI, and how to price items for profit covers the selling side.

If you'd rather have experts find profitable products for you, our eBay Product Sourcing Service researches products with real margin after fees, starting with a free consultation.