I actually talked to the owner of the XM453E3 recently, they still have it. He told me that one is serial number 1, out of 3. I had learned only a few weeks ago about the other two surviving XM453s, one Ford and one GMC, so I was really happy to find out through this site that a Reo version still exists as well. I have an interest in preserving oddball, prototype military vehicles, so I was letting him know I was interested in it. He said he would keep me in mind for if they sell it. I'd love to be able to reunite all three of them and have them on display. I'm working on getting a building for the vehicles I already have.