I think the last generation of SPARC-based workstations in wide production were the Ultra 45s. They were made until 2008, according to Wikipedia [1]. They sell for surprisingly high prices [2], for an almost-decade-old computer, on eBay.

You could probably get an old Apple PowerPC-based system for considerably less than that, and a LibreBoot-compatible x86 system for even less, but they do exist if you wanted to play around with the architecture.

And they do look pretty cool as well.

[1]: https://en.wikipedia.org/wiki/Sun_Ultra_series

[2]: See eBay item 121411279863, which is a Ultra 45 1x 1.6 GHz SPARC with 2GB RAM and 250GB HDD for almost $2k, asking price. Not sure if that's a realistic ask, but it's what they want for it.

Oh, so any sun sparc workstation of that era would work.

Understood - thank you.

There is nothing open about Ultra 45 workstations in the context of this thread (it uses Open Firmware, but that's about it).

Note that Ultra 45 workstations are extremely slow, much slower than you expect. They were very slow even when they were new. Think Pentium 2 performance.