I have an Ultra 5, an Ultra 60 and a Tritec Ultra "1E+" clone. The latter two run Solaris; the clone has run FreeBSD in the past (originally it was part of a CAT scanner). I don't use them much, though I will say that the 60 is a very nice machine (dual CPUs, dual video monitors and wonderful build quality).
Total expenditure on the hardware: $60.
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