Saw this today and thought it was worth posting.
Title speaks for itself, all preowned games (Xbox One/PS4 games shown in picture)
Also 4 for $20 on older consoles (PS3/Wii/Wii U/Xbox 360/DS) - can't be used in conjunction with Buy Two Get One Free.
Includes all games up to and including $18. So essentially can get $76 for $20.
Cheapest Free, T&C's apply see in store for full details.