I consider all my retro hardware bits amazingly irreplaceable.
Everything from my SoundBlaster Exitgy, my Voodoo 3 Pentium 3 setup, my Iomega Zip drive, my dot matrix printers etc etc.
I've shown self-control lately and haven't bought anything. I've given up on car boot sales and gumtree as I literally haven't got the room for any more kit.
At the South-West-Amiga-Group meet, I went all minimal with my setup. If you take too much, then your time is spent on setup, takedown and general fretting. If you take 'the right amount', then you can leave it be and chat with and touch other people's stuff.
My dream was to hire our local village hall and present the 'best of' !bluetonic!'s retro hardware in a 'retro computing weekend'.
If I was going 'all in', I would sell it all as a lot and just be done with it. Then hopefully, the good stuff pushes the price of the mediocre stuff up.
I admire Neil / RMC. I've met him, he's a lovely person and what he's done with his YouTube channel and his 'cave' is awesome.
BUT, I wouldn't want geeky strangers touching my stuff. Most folk are okay, but when I was doing my flight simming events, it's the nerds that want to 'crash your plane' that I can't stand.