that is a very very good price for a DSA upper with chrome lined barrel. that is about $100 off what they were selling them for just a few months back.
i think this is one of those "obama economic recovery specials". you can't hardly build one with a non chromed barrel for this price. if you count shipping your going to go over this price building one.
they probably overbuilt during the panic and now since the economy is soured they need to liquidate some hardware for quick cash--
if you need an upper by all means this is the one to get if you want a good deal.
all the DSA stuff i have seen has been very good quality.
if i wasn't obama broke i would buy one myself!