Whats a good site to order new but older x360 games?

Im looking for some of the better older 360 games to give as presents. Games like Dead Space, Bioshock and others. Amazon splits them to different sellers and shipping kills me and i just dont trust ebay really to get games. Stores like BestBuy and Target just dont carry them anymore.

gamefly... my two cents.... game are used... but usually in great shape and come with a brand new manual and case (since those are never sent to the customer)

Its gotta be factory sealed or its no good. Cant give used things as gifts. If they were for me it would be different.

ebay/amazon/half/glyde

otherwise you won't be getting them new.