Hi Dave, I own one of the 9mm carbines and love it. As far as what to avoid, I don't believe there are any bad years or serials. One thing to note is that only the factory 10 round mags feed correctly. ProMag makes a 15 rounder but it is hit or miss at best as far as functioning. Price??? Now a days I simply don't know what they are going for. The MSRP is $220 for the black and $235 for the camo.. And as always, like any H/P there's the unlimited, no-questions asked warranty. Here's a great resource for any tech. info. ---->
http://www.hipointfirearmsforums.com...board,3.0.html
Hope all is well with you and yours!!! :-)