Came across this in my search for sub-$30 copy of the game. Get an extra $1.25 off with the Target Redcard. Free standard shipping through December 23, 2017. If I recall, Target used games are similar in quality to Walmart's, resurfaced discs with case and artwork. ~10 left according to Target's website as of posting this.
If you know where to get it cheaper, please post a link please. Avg selling price on ebay is around $33 and about that much in Gamestop on clearance when I checked yesterday.