In my opinion, the AR platform is pretty accurate probly not by design but with some accidental luck. I have owned two box stock ARs, a Colt and a Sabre, but built 4 others and they have all been more accurate than your spec of 2 MOA. If you truly want to save a bunch of money, why not build it yourself. There are blem sales out there which sell complete lowers and uppers for cheap.
For plinking and casual target use, I would not hesitate to build up a Palmetto State blem, as an example. Looking at less than 600 for everything if you wait for the right sale. Bottom line is if you are really going to give it some wear, who cares about a blemish that's hard to spot anyways.
For some serious targeting with your buds who bet all the oil wells in Texas, you gonna need a lots better barrel freefloated AND a great trigger like the Geisley I just got. Wow, what a sweet snap of a release. Just those two added at least 300 to your build but it'll shoot with the best.
If you want a name brand, you just gonna pay. GULP