Sell-through rate, or STR, is a demand signal that helps you understand how often similar items are actually selling. For resellers, it is one of the fastest ways to tell whether an item has real buyer activity or is just sitting in active listings.
In Flippr, STR helps turn marketplace data into a more useful flipping decision. It is one of the signals that can help explain whether an item is likely to move quickly, slowly, or somewhere in between.
What STR Measures
STR compares recent sold listings against current active listings for similar items. In simple terms, it helps answer: are buyers actually purchasing this kind of item, or are sellers mostly just listing it?
- Higher STR usually means stronger demand relative to supply.
- Lower STR usually means the item may be slower, more competitive, or harder to move.
- STR is most useful when it is paired with sold comps, active competition, item condition, and estimated profit.
STR Is Relative
STR is helpful, but it should not be read by percentage alone. The amount of sales behind the percentage matters a lot.
For example, an item with a 50% STR that sold 1 time in the last 90 days is not nearly as reliable as an item with a 50% STR that sold 30 times in the last 90 days. Both may show the same percentage, but the second item has much stronger proof of buyer demand.
This is why sales volume matters. A high STR based on only one or two sales can be useful, but it is a small sample. A similar STR with many recent sales is usually a stronger signal because more buyers have proven they are willing to purchase that type of item.
How to Use STR When Flipping
- Start with STR to understand demand relative to current supply.
- Check the number of recent sold listings so you know how much data is behind the percentage.
- Compare sold prices with active listings to see whether the item is realistically priced.
- Factor in condition, shipping, fees, and your actual purchase price before deciding to buy or list.
STR and Flippr Score
STR is one of the pieces of data that helps make Flippr Score more useful. Flippr Score is designed to take complicated resale signals like demand, competition, comps, and profit potential and simplify them into one easier number.
That said, STR does not replace judgment. The best flip is still the item you can buy at the right price, list accurately, ship profitably, and sell within a timeframe that makes sense for you.
The Simple Version
STR tells you how much similar items are selling compared with how many are currently listed. A higher STR can be a good sign, but always check the number of recent sales behind it. Percentages are useful, but real sales volume makes the signal stronger.