FN ammo is scarce now because FN was on strike. I understand that ammo should be available in early 2013. And if you buy it in bulk from Cabela's on sale, or similar, you can get it for $15.90/box 50.
On the other hand, good SD ammo from EA is all sold out. You can back order everything except T6.
I was contemplating a PS90, but I think I'd rather have an AR15 pistol. Larger round and should you need to, you can carry them loaded in your vehicle in any state as they are a pistol, not a rifle.
Went to Cabela's to find 5.7x28 for $15.90 a box and couldn't find it. Do you have a link to where you saw it at that price?
Thanks