Run an auction (bidding on items)
Auctions (/auctions) lets you put any item up for bidding instead of a fixed price. Create a listing with a starting bid, an optional reserve, and an end time. Drop an Auction block on your site (Builder) and paste the listing ID — visitors place bids right there, no account needed. The highest bid at the deadline wins; you watch bids roll in and can end a listing early. Bidding is opt-in per item, so your fixed-price products are unaffected.