You have to have completed so many auctions with positive feed back before the gin feature is offered to you.. I'm not sure how many. Someone else may know. It's not that many.
Gin is like buy it now on ebay.. You set your price for what you want to sell it for.. :) There is a fee for it.. 50 credits which is refunded to you if gin is used.. Listia does take 10% of your asking price I believe. Welcome to Listia.. I plan to bid on this closer to auction end.. I love it! My nephew will love this for Christmas if I am the winner! Good luck!