General Knoppix support for those who've read the FAQ at the Wiki
HP 728352-B21 ProLiant BL660c Gen9 CTO Blade 4X E5-4600 V3 CPU (NO RAM NO HDD)
$228.95
Dell PowerEdge FX2s CTO Blade 4 Slot 2U Chassis 2x 2000W
$399.00
Cisco UCS 5108 Blade Server Chassis Enclosure N20-C6508 4x PSU 8x Fans 2x Fabric
$139.99
DELL PEM640 POWEREDGE M640 BLADE SERVER
$539.95
744409-001 HPE ProLiant BL460c Gen9 E5-v4 10Gb/20Gb FlexibleLOM Configure-to-
$39.99
***LOT OF 2*** Dell PowerEdge M620 Blade 2 x Intel Xeon E5-2650 512GB RAM H310
$249.00
HP Proliant BL460C Gen8 Blade Server 2x 8C E5-2690 192GB Ram
$58.69
Dell PowerEdge M630 Blade 2x Xeon E5-2695 v3 96GB RAM iDrac8 Ente Dual port 10Gb
$199.00
DELL PowerEdge M630 Blade 2x E5-2690v3 2.6GHz =24 Cores 128GB H330 2x10Gb X520
$275.00
Dell PowerEdge M640 Barebone Server Blade No Hard Drive Trays
$499.00