Anyone with enough money to purchase and operate that plane should have the common sense to provide the 10k (or whatever), in the form of a letter of credit. This assures the seller of the money, while protecting the buyer from some scamming bozo. Its common practice when engaging in large transactions with those of questionable, or unknown history and/or legitimacy.
Unfortunately, I do talk to those every once in a while that have lots of money but no clue....ah well