I have a "mixed bag" AR build. I have a DPMS lower with a bushmasher matchgrade flat top upper. I bought mine assembled, new unfired (cept at factory) upper and a used lower. I love that AR, and while I've come close to trading it in the past for other toys (ps90 usually), I just can't bring myself to do it. I may trade one day, but I just enjoy it to much for the time being. If you want a deal, you must know what a deal is. Which means ALOT of reading and know how much the main components are worth roughly off the top of your head because when that deal comes, you have to be ready to move fast. I watched AR15.com for a bit, missed out on some great deals, but that's how you learn.