"Spot delivery" is a technique where a Buy Here Pay Here dealer may let you drive the car off the lot before you're officially approved for financing, then calls back and demands more money or says you need to renegotiate the loan. To protect yourself, don't take the car until you are fully approved, and keep track of all your paperwork and everyone you speak with. Do not park the car at the dealer should you return, since the Buy Here Pay Here dealer could lock you in and repossess your car. Bring a witness with you for your buy here pay here dealings to serve as an advocate, and consult a lawyer if you suspect you're being scammed.
A Buy Here dealership can help you get the car you want regardless of your credit situation. Getting approved for Buy Here Pay Here financing is much easier than working with a traditional dealership. You can make all loan arrangements and make payments on the purchase at the same dealership you purchased the car. The dealership acts as a one stop shop for buyers that need financing since the seller is also the finance company.