General Knoppix support for those who've read the FAQ at the Wiki
IBM x3250 M4 1U Server With Four 2.5" Drive Bays
$299.99
IBM System X3250 M3 Server 8GB RAM Intel Xeon x3440 2.53ghz (NO HDD)
$41.99
IBM xSeries 330 Pentium III 1.133 Ghz Rackmount Server 1.5GB Ram No Drives READ
$76.49
IBM System x3550 M3 Dual Intel Xeon X5650 @2.67GHz 32GB RAM No HDD
$74.50
Lot of 2 IBM Intel X520-DA2 2-Port 10Gb SFP Server Adapter 49Y7962
$30.00
IBM System x3250 M1 1U Server Intel Pentium D @3.4 2GB RAM x2 250GB DRIVES NO OS
$50.00
IBM System x3650 M4 Dual Intel Xeon E5-2670 @2.60GHz 128GB RAM No HDD
$114.50
1U IBM x3550 M5 4 Bay SFF SAS3 Server 2x E5-2683 V3 28 Core 128GB DDR4 2x Tray
$318.00
IBM POWER 720 IBM 8202-E4C Server | 64GB RAM | No Drives / OS | #99
$349.99
LOT 3 Internal Tape Drives IBM CERTANCE HORNET VXA VXA2 Server
$79.99