[CrazyMatt]

If the quantities were more limited, and you had to sell back to stores for restock it might be better, I would go for 40% (to throw a number out there) resale value. It seems to me (except for unique equipment) that equipment is readily available which drives costs down to much. It would be nice if some equipment sold for higher than cost if it is very popular. Electric axes or Sic armor are some examples possibly.

The idea that if you work to get good equipment, you want to keep it because if you sell it you may not get it back easily even if you have the money the item may not be available.

+1 to Ronin's idea; That has potential for a career or skill.