Offering butchery and dismemberment from the other sider of the planet shows you have ZERO concern for the OP or the memory of his Uncles hobby.
Quite the opposite. I have been there and I can tell you that getting rid of the possesions of a late family member (in my case, my dear dad), is anything but "in memory of".
It is quite difficult to deal with the possesions and handling every single item brings back memories. This may seem "nice", but it is not. It is a constant reminder that the loved one is gone forever. It is a pertinent reminder that life is finite and "in the end, it doesn't even matter".
I had nightmares for months, where my dad would ask me why I sold his cars, why I got rid of his stuff.
At the end, when I finally was mentally prepared to sell his house (which had no chances of becoming my/our home), I made a deal with the purchaser, where he accepted that I could just leave everything that I did not want to keep and he would get rid of it (or do whatever he wanted).
I did not do that out of disrespect, but on the contrary: it would damage me too much having to deal with this myself.
So coming back to the OP, and with due respect, he has by now understood, that there are three paths:
1) Document and sell item by item: much work, stress and eventually trauma
2) Try to sell the whole lot: very difficult to find a buyer, since he must be from close within
3) Just get rid of it: easy and painless, but no money involved
Assuming that the posted pictures show the BEST that is available (wouldn't make sense that OP posts pictures of the worst stuff available), I don't see any value in it. Dave's dumpster findings are better by several orders of magnitude and I guess that if I would actively start dumpster searching in industrial areas, I would probably find better items.
Again, I mean no disrespect to OP's uncle. But let's face it: his collection is an array of spare parts, chassis and whatnot with everything being just plain old and outdated.
Regards,
Vitor