Buying & selling wines
The Spiral Library fine wine exchange is a 2-sided market, permitting buyers and sellers to easily and safely transact with one another in any one of 4 different ways.
Buy wine that is already offered for sale in the market.
Create a New Bid (wine you want to buy at a price you are willing to pay) to invite sellers to match to that bid with an offer of their wine.
Offer for sale wine that you own into the market.
Match to an open bid with an offer to sell your wine.