I Put three hundred dollars on a car decided not to buy it with a dealer no agreement or papers were signed will not give money back?
You can take him to samll claims court and say that you assumed
it was a refundable deposit, and he'll say that it was a
non-refundable security. A judge will flip a coin an decide to
believe one of you. Either way, you've learned that when it comes
to money, never assume anything.