Hey Redditors

I work in a very poor town with low employment and lots of crime. There are more pawn shops here than I've ever seen anywhere. Some of them stock things that I'd like to buy at reasonable prices. 

I have three conflicts:

1. A lot of the stuff is probably stolen (I assume?);

2. The people who pawn the items get ripped off badly - one place charged 350% interest for a loan secured against the goods; and

3. Buying something there feels like I'm contributing to a morally bad industry. 

What's the rule here? WIBTA for contributing to the industry? Is it as bad as my uninformed opinion makes it out to be? I'd appreciate any insights.

Cheers all.