Buying inventory without knowing the sales velocity is gambling. Type in any product and we'll count the real completed eBay sales from the last 30 days, turn them into a sold-per-day number, and give you a straight verdict on demand.
Sold-per-day velocity · median price · demand verdict
This number measures sold-side velocity: completed sales per day from a sample of up to 50 sold listings over 30 days. It does not count active listings, so it is demand speed, not a sold-to-active ratio.
Every reseller has a shelf of "great deals" that never sold. The price looked right, the margin looked right, and the item still sat for six months. The missing number was velocity: how often this thing actually sells.
An item that moves twice a day forgives small pricing mistakes. An item that moves twice a month punishes every one of them, ties up your cash, and quietly eats your storage. Same margin on paper, totally different business.
This tool counts real completed eBay sales from the last 30 days and turns them into a sold-per-day figure with a plain verdict. One honest caveat, stated up front: we measure the sold side only. A textbook sell-through rate also counts active listings, and this tool doesn't, so read the result as demand speed rather than a sold-to-active ratio.
Brand, model, size, condition. Specific searches give you a velocity number you can actually act on.
Up to 50 sold listings from the last 30 days come back from eBay, with price and date on each one.
Sold per day, median sold price, and a demand call: hot, steady, slow, or thin. Buy, price, or pass accordingly.
Each check pulls completed sales from the last 30 days at the moment you run it. Popular searches are cached for up to 7 days, so a repeat search may show the same snapshot until the cache refreshes.
Every run pulls live sold data, and that costs us real money. The daily cap is what keeps the tool free for everyone. It resets at midnight UTC.
It measures sold-side velocity: completed sales per day over 30 days, from a sample of up to 50 sold listings. A textbook sell-through rate divides sold by active listings, and we don't count active listings. Demand speed is what the number tells you, and for buy or pass decisions that's usually the number you need.
No. This is an independent free tool from RevenueFlows AI. It is not affiliated with, endorsed by, or sponsored by eBay Inc.
Velocity gets you the sale. Fees decide the profit. Run the same item through our free eBay Fee Calculator and see exactly what lands in your pocket after final value fees, ad fees, and shipping, before you commit to the buy.
Check My Fees → Takes 60 seconds. Free, no account needed.