Actually, I think I'd have to go a step further ... this strikes me as a PHENOMENAL price for a NIB M13! Keep in mind that original retail for these guns was often closer to $1300 than $1100, and most P7 proponents (myself included) considered it money well spent.
Used guns in excellent condition are now beginning to fetch these same prices, and -- as observed above -- the magazines alone are probably worth $125 to $150 each. NIB examples are getting very hard to find, and I'd consider this particular offer both a bargain and a wise investment. I can't do much better than that here in Germany, despite the strong dollar and widespread availability ... but then, these are essentially non-importable guns due to their fearsome and destructive "high capacity (13) feeding devices." :sad:
Chuck