We use a service that we get through a trade association Don't know what it cost, doesn't matter. We can't afford to have someone in our employ entering customer's homes without our doing a background check
Caught one guy with burglury arrests in Florida, thought we'd be an ideal company to use to case his victims. Another had a warrant in Oklahoma. Even caught a guy that was up on charges of possesion with intent to distribute that hadn't gone to trial yet. He didn't think it would show up until after he was convicted.
Just advertising that we do background checks keeps perps away.