Another thing to consider is the price of gas. Any marine transport company will tack on a gasoline surcharge that will change over time as the price of gas changes. So if you got a bid 6 months ago it will different than what they might charge you today. Therefore, don't expect to be able hold them to a price for more than maybe a couple of weeks. Also don't forget the cost of haul out whereever the boat is currently located (travellifts aren't free) and the cost decomissioning (if any). Some 25 footers have an easy to lower mast; some not so easy, this is especially true of a keel stepped mast (though relatively rare on a 25 footer) .