Perhaps at one time Buy.com didn't have a restocking fee (CNET for example still shows that they don't). 
http://reviews.cnet.com/4011-5_7-275278.html
Well, they do now - 15%.
All products are subject to a 15% restocking fee (except where prohibited by law) if returned opened or in a non-factory sealed box, provided that there is no restocking fee for defective products (see Special Returns Policy for Defective Products below)
http://www.buy.com/corp/support/returns/default.asp?what=returnpolicy
http://www.buy.com/corp/support/returns/default.asp?what=returnpolicy
Hi,
Just a note to let you know we have not forgotten about your email and we are working on your situation. We will get back to you as quickly as possible. If your situation is urgent, please telephone us at 1-800-800-0800.
Sincerely,
Buy.com Customer Support