As a practical matter, you won't be able to change the title to the boat, even if you were paid for it, while the buyers is in jail; you need her to participate in taking title, and until title is changed over, you are liable for the boat.If you were not paid yet, then treat the agreeement to sell the boat as terminated by her failure to pay and or her failure to take title--basically, since title was never transferred and you were never paid, nothing happened and this was an example of "no harm, no foul."If you were paid, write to her and let her know that if she cannot find a way to take title in a reasonable, but short, period of time (e.g. by month's end), you will treat the sale as voided and will return her money to her (ask her how/where/etc. to send it). Probably send her several letters like this, to make sure one gets through.