They are floating around online for $499 and there is a $50 mail in rebate. Why are these so cheap? When I started researching AR's a couple weeks ago I found lots of "how to build a budget AR for $500" info. Now I see complete name brand rifles selling under $500. Well I couldn't resist and picked one up last night from Gunbuyer.com. How bad can this model be compared to a $500 DYI Franken AR?