I own all 3. Traded for Disgaea when it was a $5 CC game. Traded for La Pucelle when it was $20 at Target. Bought Phantom Brave LE for $40 minus trade-in credit (still $40 at ebgames.com). Check the trading forum, there might be a few around still. Other than that, I wouldn't pay more than $35 for any of them, except for Phantom Brave LE.
Buy 2 get 1 is active at EBgames.com, so keep checking back there to see if they're in stock. Should still be active at B&M, but call first.