YMMV, but I think it's safe to say the Great Walmart After-Holiday Clearance has begun. (For better or worse...)
Coralville, IA, Walmart tonight had Blue Grimlock for $20, the Naruto crossover for $25, Hot Wheels Bone Shaker for $15 (but Twin Mill was still $35!?!), SS Airachnid(!) for $20, Retro BB for $15, and several other similar deals on AotP deluxes. Also GI Joe Classified markdowns. Unfortunately, it looks like this is part of a teardown of the collector-centric gondola, so I'm curious to see what their Transformers offerings look like after the spring reset; up to now, this was one of the best nearby stores for AotP and Crossover figures.
Other nearby Walmarts have had similar markdowns on the Retro Brawn and Seaspray, and some are even marking down some Cyberworld figures, though not as much. For what its worth, it seems as though stores that have an inventory coming up are more likely to drastically slash prices on older product ahead of time. Happy deal hunting!