I have a Mk2. I think I paid somewhere in the $1500 range new from SFRC.
When I got it I went through it before I cleaned it up and strapped glass to it.
In the initial field strip I was met by take down pins that seamed loose and a just a little too wonky with the detent. That's where it started.
The mag release and the safety didn't feel right and the trigger was mushy.
I pulled the butt stock off as I didn't care for the one that came with it and pulled out the buffer and spring.
I took the floating hand guard off and was met by some mis-alignment with the gas block and tube.
There is clear evidence that some of the small parts were made in-house, and other stuff I'm going to assume is chinese knock-off AR parts. Who knows for sure?
What I do know is that the fit and finish felt like it was 2 degrees off from 'ON'.
I took it out for a function shoot and it do ok for the whole 40 or so rounds I put through it (from memory).
I then proceeded to do a semi-complete tear down replacing the buffer spring, trigger, safety, mag release and most internal small parts and springs.
I spun off the barrel, inspected everything and put the upper receiver back together.
The upgrades I put into it are: lower parts are CMMG, Giselle trigger, Norgon ambi mag release, Magpul UBR2 rear stock, BCM pistol grip, AAC brake.
I don't have a lot of rounds through it now (less than 1000), but I'm happy where it is at.
If I didn't have the knowledge or the tools to go about overhauling it, it would have been sold off as it came for a considerable loss.
Even now, If I was to sell it, I'd strip it of the parts that were added, put it back to oem (if I can find the parts that were removed) and sell at a considerable loss, or part it out.
Either way, I suspect that the value of this rifle has probably lost upwards to almost $1000 of it's original purchase price.
I plan to keep it and shoot the crap out of it with a healthy supply of Santa Barbara, IVI, Hertinburgler and IMI surplus 7.62
Now, I actually enjoy wrenching on ARs - others may not. If you don't have the tools or the inclination to dive in and diagnose problems with it or just want a rifle to shoot and not worry about, this is not the rifle for you imho.
Also consider the market for NEA - if you buy one, even at considerable savings, you may want to think about a limited market for re-sale and selling it at a loss.
If you want something you can shoot 10000 rounds through and don't mind the maintenance and possible (probable?) issues with it, then go for it.
DSC02041 by
M J, on Flickr