During the Sandy Hook thing I sold all of my PMAGs for $90 dollars each on Ebay (before ebay had the no 30 round mag limitation). I still have about 20 regular Army issue steel mags that work just fine. Was never quite sure of the hype with the pmag, I was issued 7, so sold 6. Kept one just to have.
I wasn't trying to take advantage of anyone, truth is I considered selling most of my ammo and alot of my guns because people were offering insane prices for ANYTHING semi automatic. I had someone offer me a dollar per round for 223. I had about 3k invested in 10k rounds and would have made 7k! In retrospec I wish I would have taken that deal. But again I don't feel bad. He was betting that US would never recover. I was betting we would.