You know, In Louisiana, we have a concept similar to a deposit (we have that too), but more useful. It is called earnest money.
For example -- if you had been here and put the $2000.00 down as earnest money, you could back out of the deal, but you would give up the money. On the other hand, if the SELLER wants to back out of the deal, he has to give back the money and add a matching amount. (ie - he has to give you $4000.00 to back out.)
Any common lawyers out there to tell me if common law has something like this? It is recognized by statute here.