Not a bad price. The 7.62/.308 ARs have pretty much stayed rock solid on the selling price. That is about what I paid for my M&P10.

As far as the scope, it depends. Opinions will vary on which one to get. I wouldn't go less than mid grade (Nikon, Weaver, Vortex). It also depends on whether you want a standard reticule, quick dial turrents, or a BDC. It's all going to be personal opinion and there are many of them out there. I went with the Nikon M-308 which is designed specifically for an AR shooting 168 grain .308 Winchester rounds.