What kind of rifle are you looking for and or what do you intend to do with it?
I had 2 DDM4's and I did not care for them. Yeah, they went bang everytime, but the overall build quality was pretty standard. Wobbly upper and lower fit, the finish was far from perfect, and one of the bolts that attaches the quad rail to the rifle was stripped when I bought it. Both were purchased brand new. Noveske rifles are slightly over-priced, but when you add up the parts you are getting, I can justify that extra cash. To each his own I suppose.
If wobbly uppers and lowers bothers u check out Legion.