GameStop offers four used games for $20. (Add four games priced at $9.99 to your cart to see this discount.) Shipping starts at $5.99, although coupon code "SAVER" bag free shipping on orders of $25 or more. That's a savings of at least $20. Save on games for PlayStation 3, Xbox 360, Nintendo Wii, and Nintendo DS, PlayStation 4, and Xbox One. Deal ends December 24.