Does anyone know what would be considered a good score? I've always heard 600 and up. Has anyone heard otherwise?

The Equifax fair issacs score is a number between 300 and 850. I believe a solid score is above 750.

I can give you information as it relates to auto financing. Below 600 is considered sub-prime. Expect interest rates in the high teens to mid twenties. If you can get an approval at all. 600 to 650 is border line. An approval is not a guarantee and the rates range from 11%ish to 19%ish. Over 650 to 720 is usually a shoe in for an approval, so long as other factors are in line (debt to income, loan to value, etc.) 720 and up is spot approval land. Dealers can make spot decisions on credit, given specific guidelines by the banks with a guarantee by the banks that they will buy the loan.