see that a couple of weeks ago, but haven't watched Mat's video yet ... was a steal at first glance
so having watched it, I'd say that's a Grove TMS 2584 ... solid lifter ... couldn't decide if it was a 4084, 'til i'd seen the boom size and 't ain't big enough for a 40tonner plus the outriggers are only single extension
he's gonna have it on its side if he doesn't get some decent half sleeper cribbing for under his jack pads ... his ground's way too soft without it ... a crane in the hands of someone with only a little knowledge of it is an accident waiting to happen.

Bought a TMS180 once that'd been 'laid over' ... some idiot got in it, tele-ed out and swung round -- without the outriggers out or jacks down ... bent no3 section, when it hit the deck

Only ever seen one 4084 in the metal ... Grove had one in their yard in Bicester for their own use ... they were an awesome lifter