General Knoppix support for those who've read the FAQ at the Wiki
Tyan GT86C-B5630 12x 3.5" Storage Server Wholesale Build Your Own Server
$248.99
Supermicro 2U 6028R-E1CR24N 24x LFF- Wholesale Build Your Own Storage Server
$249.99
Dell Poweredge R730xd 24SFF 2x E5-2690 v3 2.6ghz 24-Cores 64gb H730 2x 750w
$204.99
Lenovo RS160 Xeon E3-1230 V5 16GB Rack Server β Powerful, Scalable, Reliable
$179.70
Dell PowerEdge R630 Server 2x E5-2697v3 2.60Ghz 28-Core 128GB H730P Rails
$278.45
HP ProLiant MicroServer Gen8 Server 12gb RAM I3-3240 NO HDD/OS
$174.99
Dell PowerEdge R730 Server w Trays 128Gb 2x12c=24c CPUs 80Gb SSD/2x4Tb Proxmox
$400.00
Dell PowerEdge R720 Server w 8 Trays 128Gb 80Gb SSD/2x4Tb 2x8c CPUs Proxmox
$280.00
Dell Poweredge R230 Xeon Choose Your v5 v6 CPU & RAM Configuration
$143.99
HP ProLiant DL380 Gen9 8SFF Server - E5-2698 v3 - 32 Cores- 128 GB Ram - 600 GB
$229.00