General Knoppix support for those who've read the FAQ at the Wiki
Dell PowerEdge FX2s CTO Blade 4 Slot 2U Chassis 2x 2000W
$399.00
HP ProLiant BL460c G9(Gen9) 2x 10 CORE E5-2660v3 2.6GHz 128GB RAM No SSD
$222.00
Dell PowerEdge M620 Blade Server
$39.99
DELL PowerEdge M630 Blade 2x E5-2697v4 2.3GHz =36 Cores 32GB H330 2x10Gb X520
$245.00
HP Proliant BL460C Gen8 Blade Server 2x 8C E5-2690 192GB Ram
$58.52
Dell PowerEdge R420 Blade Server Xeon E5-2430 v2 48GB RAM x2 600GB HDD Ubuntu
$48.00
Dell PowerEdge M620 Blade Server E5-2695 v2 @2.4GHz(24 CPUs), 304Gb RAM, & More
$800.00
Dell PowerEdge FX2S FC830 Blade Server Chassis Enclosure 2*2000W PSU NO BLADES
$299.99
HP ProLiant BL460c Gen9 Blade 2x E5-2680v4 2.4GHz =28 Cores 128GB P246 650FLB
$285.00
DELL PowerEdge M630 Blade 2x E5-2697v4 2.3GHz =36 Cores 64GB H330 2x10Gb X520
$284.00