What's the going price of a Beretta A390 ST?

[Therapydude]

I found a 12 gauge Beretta A390 ST at Wal-mart for $530. It looked like they may have mislabeled the price of the gun (Beretta was spelled wrong, and there was another company's name on the tag as well). However, the shotgun itself was definately a Beretta A390 ST. I know the A391 is the newer model. So, is this shotgun a good deal at $530? Thanks

 

[Bud1]

This is probably the synthetic stocked field model, with a humped-backed receiver, a 28" bbl, and a low, narrow rib. They have been showing up recently at Wallyworld, and that is a pretty good price.