http://amerusa.net/
Minimum score was 500, and now it's 600. I saw a noticeable increase in tenant quality going from 500 to 550, and 600 gives problem-free tenants. I gladly accept 5-8% under market rents for tenants that pay on time and take care of the home.
I refuse to rent to self-employed person without bank statements. 3 out of 3 self-employed renters have screwed me.
The applicants (1 application per adult) are charged $15, which pays for the credit check. It weeds out the dirty applicants. good luck, jurgen