Checkout with Google over at Buy.com as they are currently offering $10 off $10+ orders if you simply use this option during the check out process.
To take advantage of this offer, sign-up with Google Checkout before February 15, 2007. Offer valid for new Checkout customers. Limit one per buyer only.
FYI - this deal/coupon only works on in-stock items (not pre-orders or items that are back-ordered) unfortunately...
Here are the steps:
1) Click this link: Buy.com 
and search for that game / accessory / what ever and add it to your cart
2) Upon proceeding to check out, sign up for the 'Google Checkout' option (make sure you are not currently logged in to your Buy.com account).
3) Google will spot you $10 on your order...
$10 Off Items to Consider: