Show HN: BidWix – one-shot price agreement using secret max/min

Hi HN — I built BidWix, a small negotiation tool for agreeing on a price without haggling.

How it works:

- The buyer enters their true maximum price (kept secret from the seller). - The seller enters their true minimum price (kept secret from the buyer). - If there is overlap, BidWix suggests a single “fair” price using the geometric mean (so the compromise is symmetric in percentage terms, not absolute currency units).

Notes:

- No signup. Email is optional. No ads. - BidWix stops at the price suggestion. It does not handle payment, contracts, escrow, or delivery. - It’s meant for cases where both sides want to make a deal, but don’t want the “you go first” dance. - I’m not a skilled negotiator myself, so I wanted a tool where negotiation skill is less of an advantage. - It seems to work especially well for intangible goods (I’m a sound designer).

If you try it, I’d value feedback on:

- Where the flow feels confusing or too wordy. - Whether the suggested price feels reasonable in real negotiations you’ve had. - Any edge cases or incentive problems you see.

Optional background (rationale + math): https://bidwix.com/articles/why-geometric-mean-feels-fair

A great day to all of you! Stéphane (the guy who built myNoise)