i own a stag model 4 and my friend has a stag model 2. i paid 900 OTD, he paid 950. both have performed flawlessly except for mine. i had a double feed ONCE. i attribute that to the magazines fault, not the rifle. ive put around 1200 rounds through it so far. ive been very happy with my purchase and would do it again. they have a good warranty and customer service. if you do not want to build an AR (as that would be cheaper) i would suggest stag, rra, dpms, S&W as good brands to compare.
that offer you mentioned sounds reasonable
attached is the photo of mine.