Technically no, but you hopefully you don't lose more than the deposit. Sometimes a signed written agreement is not enforceable, but this usually is not the case. Even boilerplate contracts are enforceable, and the person signing it is deemed to have read and understood it. If the agreement you signed says that you are obligated to buy the products, then you could be forced to honor the agreement. However, it costs money to enforce a contract. Chances are that the seller doesn't want...