No, they removed that option unfortunately. I used to block people with less than 5 feedback with accounts that weren't verified. Once they verified their account, they weren't caught by that block, and that was OK. I used that setting to block guest accounts.

Often it's not low feedback buyers who don't pay. The handful that I've had over the years were all over 1,000. Of course people do get non payers with low feedback, but that wasn't my experience.