I'll say this. If I EVER pay $3500 for a video card, that company better damn well still be in business 20 years from now and supporting their product because I'll still be using it. No way do I pay that much for something and end up scrapping it or selling it for a pittance just because it's old.
Rasterops sucked, though, because when they were dying and no longer making video cards but still supporting their old ones they were charging a ton of money for drivers and software so if you were looking for a used graphics accelerator back then you avoided Rasterops cards like the plague because even if you got the card for free, you'd be paying through the nose if you needed drivers or software.