Dom, your looking at a couple single AI's here, out of warranty, don't know how much use they have gotten? Don't see anything about extras. A new AI is 4k. So at $2400 each or about 60 percent of a new one (which has the latest updates/full warranty), I think it's too high. Think of it this way, let's suppose the hull gets a non repairable leak, what do you have left? An older style mirage drive, an older set of Amas/akas, an older style seat (not worth much), an older styled AI sail, also the older styled twist n stow rudders. What are those worth to you? To me, about $500, maybe not even that. Go NEW. Otherwise for just the basic older out of update AI's, no more than 1k each would I go, if you know what to look for in leaks, etc. and are handy to work on.
If folks knew what potential problems lay hidden in these older Hobies, they wouldn't be paying these exhorbitant prices, used. Go NEW, thank me later. Get a NEW tandem, TI, for this price of two used AI's plus $800, again thank me later, shop around with dealers, might find a full warranty demo/new tandem for a steal this time of the year, 1k less.
