A major factor is whether or not the barrel has been stamped with an import mark. BLUE SKY is an awful feature to have, and cuts the price by hundreds. The small import mark on bottom of the barrel (tiny) is detrimental, but not nearly as bad as the BLUE SKY.
Bore erosion can be checked with a .30-06 bullet if you have no gauges. The brass should stand off from the muzzle by 1/4" or so if it's not shot out.
QHMC carbines are otten in better condition than others, in my experience.
If the stock hasn't been disfigured in any way, that's good. If it has the original arsenal markings (on right side of butt stock) that's a big plus.
The maker of the barrel is important too, and I've generally seen Rock-Ola and Underwood barrels on QHMC carbines.
If all of the features I've mentioned are good (no import mark, no after-market parts, no alterations other than US armory upgrades, etc., price between $1,000 and $1,600. If the sling and oiler are military issue, add $50. Mags should be USGI ($25-30 each) but if aftermarket not over $10 each.
The Wolf ammo isn't great, kinda dirty, but still decent ammo. Allow no more than $20 a box for that, IMHO. The M2 stock is a slight detractor, take off $100 from the price.
Hope it's a good one, and you get it "right", price wise.