Cheapest I've seen this game outside of the Black Friday lightning deal ($14.99).
Note that this game comes with a PSN voucher for the online pass - this means that used copies potentially will be unplayable online without buying the pass from PSN - for $19.99. Digital copies of the game for $39.99 on PSN include this too.
http://www.amazon.com/Phantasy-Star...LTIC/ref=sr_1_1?ie=UTF8&qid=1292334410&sr=8-1
Note that this game comes with a PSN voucher for the online pass - this means that used copies potentially will be unplayable online without buying the pass from PSN - for $19.99. Digital copies of the game for $39.99 on PSN include this too.
http://www.amazon.com/Phantasy-Star...LTIC/ref=sr_1_1?ie=UTF8&qid=1292334410&sr=8-1