It's true that the IP for this user sources to an e-mail provider that is headquartered in a different state (GA) from Truman. However, the IP for the user sources to the same state (FL) as the location for Truman and a state where the e-mail provider has e-mail customers. That along with the fact that this new BBS registrant miraculously found TUG to post this glowing report twice should be enough to make readers suspicious.
Next, Truman's website has only 60 listings and has many, many typos. For example, the very first timeshare listed is "Marriott Mountain Vallet", a timeshare that doesn't exist. And it's supposedly in "Rickenbridge, CO", a location that doesn't seem to exist. Yes, I know what was intended, but is that sloppiness worth paying a substantial upfront fee, especially when there are so many legitimate timeshare resellers that don't charge such fees and have excellent track records among TUGgers? I think not!
Further, the consistent experience of TUGgers who get similar unsolicited calls from companies claiming to have a buyer is that such calls have been scams.
Thus, I believe the advice in this thread from longtime TUGgers is sound advice.