General Knoppix support for those who've read the FAQ at the Wiki
Cisco UCS B200 M4 Blade Module 2x Xeon E5-2680 v3 12-Core NO RAM NO HDD
$39.99
Dell PowerEdge FX2s CTO Blade 4 Slot 2U Chassis 2x 2000W
$399.00
Sun Microsystems Blade 100 Workstation UltraSPARC-IIe 500MHz 256MB Server No HDD
$95.00
DELL PEM640 POWEREDGE M640 BLADE SERVER
$539.95
HP Proliant BL460C Gen8 Blade Server 2x 8C E5-2690 192GB Ram
$58.15
Dell PowerEdge FC630 Xeon E5-2660 v4 256 GB DDR4 1U Server No Drives/No OS B9
$424.99
Dell PowerEdge M620 Blade Server 2x 10C E5-2690v2 64GB Ram 2x 600GB 10k HDD
$125.00
Google Search Appliance - Dell PowerEdge R710 x2 Xeon X5690 192GB Memory 6TB HDD
$529.99
Dell PowerEdge M640 Barebone Server Blade No Hard Drive Trays
$499.00
DELL PowerEdge M630 Blade 2x E5-2697v4 2.3GHz =36 Cores 128GB H330 2x10Gb X520
$351.00