What you will be dealing with is typically referred to as a 'buy here, pay here' place. As long as you have a source of income, they will sell you the worst possible car, at the highest possible price, with the highest possible interest rate - resulting in a massive car payment (most of which will go towards interest). (Oh, and you'll have to maintain full-coverage insurance on it as long as it is being financed).
As with all used cars, it will be sold 'as is', meaning that when (not if) it breaks down, you'll be responsible for ponying up the cash to fix it.
They may also require you to have a GPS location device in the vehicle, so that when you fail to pay your exorbitant payment, they can easily locate, and repossess it.