You can buy great deals on auctionsoftware.com . whether you want to buy an item in a fixed price or buy now price or you can take part in an auction to win that perfect item.
All your bidding and buying activities will be recoreded under “My bids” and “Buy now transactions” tabs.

If user purchases an item for buy now price, the formula will be as follows,
Buy Now = Buy now price – bids credit spent