Some Best Buy stores have Odin Sphere in a 50% off clearance bin by the registers. Rings up at $40, manager does a manual override to $20. I picked up the last copy at my local BB last weekend. (also got R6:Vegas for PS3, same price)
I checked a couple other nearby Best Buys for other games, but none of the other stores even had a clearance bin so definitely YMMV.