From what he has said, the re-sell has been done on another 'old' but restored shell.

If this was done recent it would be on a Q plate, however, from reading what the guy has said it was done 6 years ago, which would have been just before the DVLA changed the rules on re-shelling a car on a used shell.

It certainly looks this business, but had it been reshelled on a new shell the value IMO would be far greater than one on a used shell. Really needs a meticulous viewing and inspection to be sure if its really as good as he says.