I think it's pretty significant and it need not be explained :P
The top 2 were new on amazon($8 for Requiem, 15 for Farcry 2), and the CD was $5 new from ebay.
As you requested...
But they run very large. I had to size down 1 whole size. Just make sure you understand any return policy in case you order the wrong size.
All the best,