Honestly, nature runes are quite easy to get and when I buy green d hides, I don't account for the price of natures. For me, I'd probably stop at 4.5k for the d hide bodies. 100gp+ "profit" each is good to me. There are plenty of stuff you could do to make the money back that you lost from nature runes. That's why I overprice stuff when I'm trying to buy something XD