I do a fair bit of retro computing, and assembling a fully operation platform like that can take years of sleuthing.
Often disk drives are destroyed, which is somewhat understandable. But the media kits are often binned before e-waste companies come to pick up the hardware. So you're left with really interesting hardware and a hunt to make it usable.
And the gray zone where people that do have it don't necessarily want to share the bits because it's still copyrighted including the companies or current rights holders that otherwise don't care.
Assuming you have base OS, it's then very hard to find COTS applications that showcase the platform. SGI IRIX is one exception because there's a somewhat large hobbyist following.