I think you have a good argument that a contract was formed, although I am assuming the asking price was relatively close to what you offered. However, a court likely would not specfically enforce the contract and, besides, there is not enough more involved to make it worthwhile to go to court. I would look for another boat.
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Sounds like a scam.... count your blessings that you never paid any money, and run, not walk, away and as far away as you can.... save your paperwork (including where this person said "had not received any other offers"), in case he/she tries to go after YOU for the money!
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Possibly, but a lawyer would need to carefully review the entire text/email history to form an opinion. Most lawyers in your area could advise you on this. Depending on the type of "boat," quite possibly covered by RMV regs and the UCC. Good luck.
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