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A: If you have decent amount of disposable income monthly, I'd look into getting those Collections paid off. As well as asking nicly for PFD, this will help get better APR once those are no longer reporting.
B: Since you're getting high APRs everywhere you go, I would makes substantial larger payments over the minimum due. In order to pay it off sooner and pay less interest.
Or even do both.
I think he was saying he DID pay them all off and is now having trouble vs when they were open and he did get financing.
Try your bank and tell them you can put down a pretty good amount. Since you say you could pay cash. They can see what you have saved up. This might help. Then you wont be upside down once you drive off the lot. Good Luck!