How does an auction site can make a profit? I don't consider adsense.I would like you to give me valuable suggestions and ideas.
eBay, the biggest auction site, charges a listing fee (a very basic auction is free, but adding images costs $1 per image, bolding the auction listing costs $1, etc). They also charge you something like 5% of the final price if your item sells. It's really easy to rack up $10 in listing fees and then another $10 in fees if your action sells for $200. However they own Paypal and can easily enforce the payments, which isn't really an option for new sites.