When I got started collecting curios and relics in the 1990s, there were a few places that you always checked out. These included Century International, Southern Ohio Guns (SOG), Samco Global Arms, and AIM Surplus. There were other places, of course, but these are the ones I remember the most. The golden days of Conex boxes full of WW2 surplus arms and ammo arriving on our shores constantly have come to an end. Samco and SOG are now gone. Century International is more Caniks and AKs than anything else. That leaves AIM Surplus which, while it still sells some curios and relics, seems to have made the transition to more modern arms and parts earlier than the others.
I came across this video tour of AIM Surplus while cruising Arfcom this afternoon. Having purchased everything from Schmidt-Rubin K31s to PMags from them over the years, I found this guided tour of their operations very interesting.