If you’re a member of KaBid, and you sell a product on the auction site, you don’t get billed automatically, but you are asked to participate in their “Honor Payment System” through which you can pay something if you wish.
It’s an interesting model, and I’m curious if they can stand anywhere near auction market owner eBay with something like this. Based mostly on ease of use and lack of transitioning to a new service for current busy auction users, I’m not sure how much of a dent KaBid can put in the market, but you never know with the Internet….