Today I can confirm that YMMV, as only one of my three local Targets was sporting those prices. When I saw those games at another Target today I scanned them just to make sure and they still ring up at the normal prices. They are also clearancing rechargable 360 batteries for $8.98.
Best Buy
Batman: Arkham Asylum limited edition $69.99
Bioshock 2 limited edition $69.99
I hope nobody paid full retail for those because they will probably drop even lower very soon.