[StregaChess]

You need to take some care with this. I'm a eBay powerseller with feedback of over 6,000. If you have a low feedback score and no established track record folks are not as likely to pay top dollar.

The biggest concern/advice I can offer is that video games systems are very problematic. Many times you’ve have fictitious bidders with feedback scores of under 10 or even negative. Possibly it’s the other guys selling trying to screw with your auctions. You’ll find your item sells for 5x value but you’ll never get paid. And with a time sensitive item you need to get paid right away.
You may want to consider only allowing pre-approved bidders (see ebay for details) or stating that you’ll only allow feedback scores of +25 and canceling bids of the scammers.
Id’ also require immediate payment via paypal as an option.
Good luck.. if you give it a run…