Not really worth owning at that price. I'd wait till it got to 29.99 or less, preferably 19.99. I bought it at GoHastings.com for like $30 and beat it in about 9 hours, and traded it in for $33.
edit: Amazon's trade-in is currently $30 (w/o book) so you could buy it, play through it, trade it in and keep the art book.