After you get the rhino beetle hide you can take it to Dirty Llew and he will change it into a shield in 10 days for 10,000 g0ld. This resulting shield isn't that great, but you can then take it to Nym and he will enchant it for 28,000 more gold and now you have a really nice shield. After that , you can kill them both(they are both evil), and you get all your money back!