The finance in the secondary car market is going through quite a turmoil.
It used to be the case that car finance was 'realtively' easy - since a lender had the security of taking the car off you and selling it - something that they can't do with a normal loan or credit card.
However, car prices are dropping quite rapidly, and noone knows what a car will be worth in 1 years time - so they don't know if they will be safe or not if you default in your payments.
Working in the industry and knowing a fair few car dealers, I would suggest that at the moment you would be hard pushed to find finance.