@PRRMP54 posted:There was one produced by Max Gray/Ken Kidder/US Hobbies(?) in a long-hull and a short-hull version, sometime during the late fifties/early sixties; I have one of the short-hull versions.
Those were done by Kidder and they have been getting a bit pricey when they appear on the market. There was an early and full scale one as well that had an operationally accurate drive truck as well.
Many years later, Precision Scale (or someone similar) produced a run of McKeens (including the short trailer); they are the ones that go for megabucks.
It was PSC and it depends on what you define as megabucks - last one I saw sold was ~$1500. I've never heard or read anything about those PSC models actually ran.