The fair market value of an item is the price it will bring when it is offered for sale by someone who doesn't have to sell it, and purchased by someone who wants it, but doesn't need it. Every citizen has a right to enjoy his property and the sanctity of his person. Any act of another which substantially interferes with that enjoyment is a tort. A sale consists of passing title from the seller to the buyer for a price. A contract that no sane man would make, and no honest man would take advantage of, is not enforceable.
Words used in a contract bear their common meaning.
A gift is complete when the giver intends to give it, it is delivered, and the recipient gets it. You deal with other people's property at your own risk. If you carefully analyze your case in the light of these two principles of law, you should be able to fairly predict the outcome of your case at trial. If you are ever in a law library, and feel awed by the number of thick and imposing books, the above is about all that is in there, said thousands of different ways, and applied to thousands of different case facts, each beginning with something gone wrong in the simple transactions encountered in daily life. A court is a legal repair shop.