I think if you are making an offer it will need to have a monetary amount. Otherwise how does the seller know whether he likes your offer? Think about it from his perspective.
You don't necessarily need a deposit. I wouldn't pay a deposit on a boat unless I had some way of enforcing a refund should I decide to bail on the purchase following an unsatisfactory survey or sea trial. If you're going through a broker it's probably safer.
One option to "hold" the boat for you is to put the money in escrow, but probably that will be considered overkill for such a low-priced boat.
You don't necessarily need a deposit. I wouldn't pay a deposit on a boat unless I had some way of enforcing a refund should I decide to bail on the purchase following an unsatisfactory survey or sea trial. If you're going through a broker it's probably safer.
One option to "hold" the boat for you is to put the money in escrow, but probably that will be considered overkill for such a low-priced boat.