At drivetime, I’ve been told that my rates might be lower if I got a pre-approval from my bank instead of going through them (if I have the credit score for my bank/credit union to give me a loan)

Carvana is a sister company of drivetime. Drivetime’s target customer base is sub-prime. Putting 2 and 2 together, this doesn’t surprise me at all. Their lowest interest rate might be 16% (for their target customer base) and goes upwards of 30%