I'd also say a used Ruger Mark II. Can't get any better than that but you may not find one for $200. The new Mark III is a good pistol but more annoying since it comes with a bunch of lawyer features.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
US Army 1966-69, VFW Life Member, Retired Geek
My wife found it on gun broker for like 220 and when she went to a local store to do the transfer the owner said he would sell it direct for about the same. N. Since she has her ccw she picked it up then and there
The transfer fee is variable but small business's will charge what the market can bear. The paperwork is PIA and they can/will charge accordingly.
Thread: don't buy someone else's problem; increase budget to $269 and you can get a new Ruger MK II or III. I prefer the 5.5" bull barrel but for more $$$ you can get it fluted, more $$$ stainless etc.