Its got to be a location thing. We have backpage to advertise stuff for sale, there are still $700 AKs that arent selling. Lots of AR's advertised for 1200 and up but the same rifles keep getting relisted. Korean AK drums for $200 and not selling. (I think apex has them in stock for 150?).
I did have 3 of those korean glock 33 rd mags, I did manage to trade for a old winchester shotgun. I even told the guy I thought he was getting the shorter end of the deal, so I threw in a 10 round glock mag. But he was more than happy. Jim