Rare machine, and desirable, too. And it looks to be in remarkably nice and "unmolested" condition.
It's not specified what currency the asking price is. If US dollars I think the price is pretty darn high. If priced in Canadian dollars, that equates to $29,536 - as of today. (That still seems on the high side, at least to me.)
I don't understand the nomenclature though. Wouldn't a 542 be a two door machine with wide steel tracks? A later rubber track conversion would explain the track differences, but not the cab configuration. (It looks like most of the idler wheels are the early style Tucker used, which were R&K wheels.)
In reading Track Addicts thread about his 1443, I wonder which axles this has. Are they the Dodge corporate ones, or Dana 60s?. In looking at the photos the axle hubs look like Dana 60, but I'm not certain.
Another question would be the fifth wheel plates (some call them "turntables"). My impression is they are the earlier aluminum castings rather than the later style welded steel type.
Another item I'll point out is the blade's cutting edge. It looks to be one piece. My Tuckers with factory blades had three piece cutting edges. The blade is probably 9'6" wide, with the main center part being 8' wide and two bolt-on wing sections at 9" each. The wing pieces have cutting edges that overlap the center section, maybe 15" on each side. The center portion cutting edge is commensurately shorter. That overlapping cutting edge gives the wing pieces a lot of their strength. The underlying concept here is that by removing the wing pieces the blade is 8' wide, which is a legal width. If the cutting edge on this machine were one piece, unbolting the wings does you no good, unless you remove the entire cutting edge, which would be substantially more work. (Not a deal breaker, but something to consider.)
Truthfully the Tucker installed cutting edges were maybe on the weak side. (I say that because one somewhat resembled a potato chip as it was bent.) They were 1/4" thick and 4" high. I replaced my bent one with one that's 6" high and 1'2" thick. Yup, more weight, and in the wrong spot, but a whole lot stronger.
Not much of an issue, but missing the rear bolt-on pintle hook.