General Knoppix support for those who've read the FAQ at the Wiki
1U IBM x3550 M5 4 Bay SFF SAS3 Server 2x E5-2683 V3 28 Core 128GB DDR4 2x Tray
$318.00
IBM SYSTEM x3650 M4 Xeon E5-2609 2.40GHZ 16GB DDR3-1066MHZ 2x 550W PSU TESTED
$109.95
IBM Power S822 8284-22A 12SFF Power8 3.89GHz 6Core 64GB RAM No HDD Server System
$359.99
IBM Power S822 12-Bay Server System Power8 Core 3.42Ghz DVD-Rom Drive 64GB No HD
$399.99
IBM SYSTEM x3200 M2 Server - HDD wiped, No OS
$75.00
IBM Power8 S822L 20-Core 3.42GHz 256Gb 1.2Tb 40G Elastic Storage Server 5148-22L
$599.95
$66.50
IBM AC1 7870 BladeCenter Blade Server 2*Xeon X5570 2.93GHz 12GB SEE NOTES
$11.13
IBM System X3650 Server M2 2 x Xeon X5570 2.93 Ghz w/128 GB/DVDRW
$169.99
IBM Lenovo X3650 M5 2U 8x 2.5β CTO Rack Server β 2x HS, 2x 750W
$199.00