Auto Loan without co-signer

I need a way to get a car...my credit isn't great...590-630 depending on the bureau you pull from. Co-signers aren't an option for me. I realize i am looking at higher than ideal rates, but I can't put if off any longer. Where cna I go? i see ads all the time for bad credit auto things. I know i can afford something in my budget...i'm just trying to figure out a way to get moving. Please offer any advice?