From the BB blowout, I didn't manage to find anything, since I think the ones in my area were picked clean by the employees. Plus, this was before I found CAG.
From the CC blowout, I managed to find 35 games for myself and 5 for a friend of mine. Plus, bought three other games from other CAGers who picked up ones I couldn't find from the CC sale.
From the TRU blowout, I've found 12 games for me and one for a fellow CAGer, so far. Might find a couple more, through other CAGers.
In volume, I'd say CC was better for me, with a few bright spots (Pikmin, DOA:XBV, Crimson Sea), though pretty much everything I found at TRU was a bright spot (Fatal Frame, Otogi, Dynasty Warriors 3 & 4, SSX3, to name some).
At this point, who's next, CompUSA?