First Signup for listia from here to have your bonus 1000 credits. Once you complete your signup you can earn about 5000 credits just completing your profile. Once done, you are ready to be a seller.
1) List five auctions of bitcoins (ex:-.0001 bitcoins for 100credits). Remember, first few days you have to do some hard things to make your way to profits.
2) Once you finished your listings send the winners what you promise them and get positive feedback from them. (you need 5 positive feedbacks)
3) After 20 days you will earn "Seller Wings" badge and now you are ready to buy and bid bitcoins in listia. Search for bitcoin auctions, bid and win them, have fun with your coins.
Not only bitcoins, you can shop many stuff here. No need of waiting 20 days to bid on other stuff. That's it.Signup with my referral link to get your bonus 1000 credits.