General Knoppix support for those who've read the FAQ at the Wiki
HP ProLiant ML350 Gen 9 Server 64GB RAM 2.4GHz Xeon 12-Core E5-2667 v3
$300.00
HP Z230 Workstation Towers Xeon E3-1231 V3 3.20ghz 8GB Ram NO HDD
$39.96
HP Z620 Workstation Tower Xeon E5-2650 2.0GHz 32GB ECC RAM No HDD/GPU Computer
$49.50
Intel Xeon E5-2673 V2 SR1UR 3.3 GHz 8 Core 25 MB 110 W LGA 2011 CPU Processor
$40.00
Intel Xeon E5-2680 v4 SR2N7 14 Core 2.4 GHz Server Processor
$15.45
SR1XP Intel Xeon E5-2680 v3 12 Core 30MB 2.5GHz LGA 2011-3 Grade A Processor
$4.23
Intel Xeon E5-2697 V4 2.30 GHz 18C 2011-3 2400MHz 45MB 145W SR2JV CPU Processor
$49.99
INTEL XEON GOLD 6148 20 Core SR3B6 2.4GHZ 27.5 MB L3 Cache CPU
$92.99
HP ProLiant DL380 Gen9 Server 1x Xeon E5-2620V3 2.40 GHz 16 GB RAM No OS No HDD
$114.95
Intel Xeon Gold 6136 SR3B2 12-Core 3.0GHz 24.75MB LGA 3647 Processor
$31.45