alt Hacker NewsLate 90s / early 2000s was when Sun workstations changed from very expensive but well constructed proprietary machines to very expensive PCs with cheap internals and unusual processors. However I still got an ex-university Sun workstation around 2002 for free (or a token price?) which served me well as a desktop machine for years and years. It eventually died of the capacitor plague that (to be fair to Sun) affects just about everything from that era.
Setting the SPARC bits aside, I feel like the Ultra 20/24/27 machines were well-constructed 64-bit x86 machines with regular AMD and Intel processors and ECC memory and reasonable fans and so on. I don't remember how they were on price, but I feel like they were not outrageous when compared to similar lines from Dell or HP at the time.