If you do decide to sell it on ebay make SURE to ship to a confirmed PayPal address only, or accept a money order.
Also make sure to get signature (not delivery since it would go for over $250), and make to pack it VERY well. I would strongly advise you to spend the extra $3 on insurance as well. If someone wins your PS3 and it arrives broken/they get buyer's remorse/etc., you will be protected. If you're in the US, don't ship to any other country but the US and Canada, as those are the only countries PayPal will protect you in.
Some people can win pretty ridiculous PayPal claims, so it's important to cover yourself, especially for such a high-priced item.