SWD M11/9 was my choice for my first because of price, parts availability and all the configuration combinations (smg, .22LR conversion, carbine conversion & others thanks to Lage & others). It's kind of like having 3 machine guns for the price of 1. Mine transferred from out of state on a form 4 with 100% paid to seller before first transfer. I don't mind telling you that until it actually showed up in my dealers hands, I was quite apprehensive. But I had done due diligence in investigating and internet stalking of the seller, so other than buying face to face in state from a dealer, it was about as safe as I could make it.
My only regrets are that I didn't take the step into the sordid world of transferable machine guns sooner and that I didn't buy more sooner.