I know a lender that does 620+. Your first step should be to contact a loan officer to obtain a pre approval, determine what your purchase price range will be and your financing options. The lender will be able to tell you the rates and costs associated with each loan type. It's important to determine what type of financing you'll be using, as some condo communities might not fit with your type of financing.
Upon request, I'd be happy to provide you with recommendations on loan officers.
Century 21 Diversified