And if you read past the link they will seem to make a big deal about it being the last of the McQueen cars to go to auction, and it is not.
That's because they are lazy and not thorough in their education about Steve McQueen's driven or owned vehicles. There are at least 2 vehicles he's known to have driven or owned, in this example it's the two he's owned, that haven't went to auction, and one is the truck he donated to the Boys Republic school for boys, and the other is a Manx.
Yep, another Manx, and not just a movie car like the above, it's a Manx he owned https://justacarguy.blogspot.com/2018/11/it-probably-is-no-surprise-that-steve.html
it was meant to be a stunt car for a movie McQueen had in pre-production that was set to be one of the biggest films ever made called “Yucatan”
anyway, I'm still not sure if the above is the same car that was at the Pasadena Art Center Car Classic in 2014 http://justacarguy.blogspot.com/2014/10/the-thomas-crown-affair-manx.html