THink about this
What good are contracts if the seller spends the downpayment on an emergency and you want your money back? Get a lawyer? That will cost more than the 10% you will forfeit. What if you decide you want out because of a bad survey? Same thing, we are back to a lawyer again. you have 2 practical choices. 1). Find a close friend that knows alot about boats, check it out and buy it. Depending on the cost of the boat and potential problem areas this can be a costly mistake. 2). When i bought my current boat, it too was for sale by owner. No way was i going to give $1500 deposit to a stranger. If he didnt want to break the deal, i would not be able to either, so now i could be stuck with a boat i didnt want. What i did was , i went to a broker that i had used on a prior occasion to buy a boat, asked him how much he wanted to handle the transaction. He charged me an extremely reasonable fee. I gave him the deposit, he called the seller and handled the whole deal. All went well. If for some reason, i had a legitimate reason to back out (bad survey, bad paperwork, etc), the broker had my check in escrow and i was safe. Good luck and above all, DONT PLAY LAWYER, or you will really need one if all goes south. remember, a contract can work against you also.