This is just strange. A lot of old die-cast cars on Ebay. Of the 14 or so items pictured, 4 of them are exact makes and models of 1985 TFs.

You'll see Hook, Bonecrusher, Long Haul and Inferno.

And I don't just mean you'll see a fire engine, bulldozer etc... I mean these are the exact models.

http://www.qksrv.net/click-1645815-5463217?loc=http://cgi.ebay.com/1970s-tomy-tomica-11-vehicle-lot-mint-unplayed-with_W0QQitemZ7006430351QQcategoryZ50286QQrdZ1QQcmdZViewItem

 

I believe those are Maisto toys, probably from the '70s-'80s. While they bear a resemblance to the constructicons, I don't think they're exact model duplicates. There are some differences in Hook's design when compared to the crane truck in that auction.

The resemblance is uncanny, though. You've got to wonder if Hasbro/Takara were using these fellows as a reference when they did the constructicon molds.

 

the construction vehicles from that line is what that JD Productions guy used to make that craptastic devastator statue he released a while back and never reached a single person intact.