General Knoppix support for those who've read the FAQ at the Wiki
HP Z440 Workstation 18 core Xeon E5-2699 V3 64GB 1TB SSD R5-340X WIFI WINDOWS 11
$189.99
Apple MAC Pro A1481 Late 2013 Xeon Quad-Core 3.7GHz 32GB 1TB SSD FirePro D300
$285.00
INTEL XEON 5218R GOLD 2.1GHZ PROCESSOR | SRGZ7
$549.99
Intel Xeon E5-2687W V2 SR19V 3.40Ghz FCLGA2011 8 Core 16 Thread CPU Processor
$39.99
SR1XP Intel Xeon E5-2680 v3 12 Core 30MB 2.5GHz LGA 2011-3 Grade A Processor
$3.82
Intel Xeon Gold 6140 SR3AX 2.3GHz 18-Core Processor CPU
$32.79
Intel Xeon E5-2680 V4 2.4GHz 35MB 14-Core Processor SR2N7 *km
$13.99
Intel Xeon E7-8890 V4 2.20GHz 24-Core 60MB LGA2011 Server CPU Processor SR2SS
$29.99
HP Z440 Workstation 18Cores Xeon E5-2699 V3 128GB 1TB SSD 2TB WIFI WIN11 R5-340X
$309.99
Intel Xeon E5-2667 V4 SR2P5 (3.2GHZ/8-CORE/25MB/135W) PROCESSOR CPU
$29.89