We checked 34 days of AliExpress "before" prices. The seller's number never once matched our record.

Quick story: a wireless earbuds listing on AliExpress shows "57% OFF" — crossed out from $74.52 down to $32.37.

We'd been logging that exact listing's price once a day for 34 straight days. The highest price we ever recorded in that window was $35.77. The seller's $74.52 "before" price never appeared — not once, on any of the 34 days.

That's not a one-off. Across the listings our small team tracks, most "before" prices sit well outside anything we've actually seen the product sell for.

So we built PriceProven — a free Chrome extension that shows the recorded price history right on the AliExpress product page. No sign-in, no account, no upsell tier. We're not making any money on it (revenue is $0, on purpose, for now) — we just wanted a tool that tells the truth about a price before we buy something.

We keep a public "what we got wrong" log too, because we'd rather be corrected than sound more confident than the data supports.

Chrome extension (free): https://chromewebstore.google.com/detail/oimaeaabbkjaeplnijjiengkddndgdin
Site / methodology: https://priceproven.com

Genuinely want this crowd's take:

1. If you were in our shoes — $0 revenue, a tool whose whole pitch is "we tell you the truth" — would you ever charge for it? Or does putting a price on it undermine the trust angle from day one?
2. Is this even a fixable problem long-term, or the moment a tool like this gets popular, do sellers just start setting "before" prices that dodge whatever we're measuring?
3. Have you personally caught a fake "before" price anywhere — AliExpress, Amazon, Shein? What tipped you off?
4. Would you actually use something like this regularly, or is it more of a "check once when I'm suspicious" tool for you?

Happy to go into how the daily tracking works, or why we picked "days tracked" over just a percentage.