I'm waiting on a sale on the Arkham City GOTY edition. Figured SOMEONE out there would have a sale on it by now. A lot of these GOTY editions get at least a $10 off sale in the first or second week of release. Fallout NV, Fallout 3, Red Dead, LA Noire, GTA 4 Complete all come to mind.
They should make the GOTY edition $20, given the horrible box art.