All other variables aside, one particular variable stands out, Electronics, how outdated are they? A prospective buyer may examine the electronics and determine they are all antiquated and require replacing in order to gain some negotiating leverage. Never mind that the electronics still function and they cost you a bundle, they are in fact outdated and worthless in the current market given what is currently available. Electronics also just keep getting better and cheaper to buy. After 10 years you may deduct the entire cost of all electronics from your asking price because the buyer will likely be replacing them.
Are sails something that are maintained or do they finally wear out after 10 years?