General Knoppix support for those who've read the FAQ at the Wiki
1U Supermicro Server 10 Bay 2x Intel Xeon 3.3Ghz 8C 128GB RAM 480GB SSD 2x 10GBE
$273.00
DELL PowerEdge R730 Server 2x E5-2640v4 2.4GHz =20 Cores 32GB H730 4xRJ45
$259.00
Dell PowerEdge R630 Server Barebone with Motherboard 2 x Heat Sink 2 x 750W PSU
$149.99
Dell Poweredge R720 2x Xeon E5-2670 v2 2.5GHz 20-Cores / 128gb / 600gb / H710
$249.99
Dell PowerEdge R630 Server 2x E5-2680 V4 = 28 Cores S130 32GB RAM NEW 480GB SSD
$208.99
Dell PowerEdge R420 Dual Intel Xeon E5-2440 v2 @1.90GHz 32GB RAM No HDD H710
$74.50
Dell PowerEdge R620 Server 2x E5-2660 v2 2.2GHz 20 Cores 256GB RAM 1x 480GB SSD
$139.99
Dell PowerEdge R620 Server - 256GB RAM, 2x8cCPU, 120Gb SSD/3x900Gb SAS, Proxmox
$320.00
1U 20" Short Depth Server Firewall PFSense X11SSH-F Xeon 3.5Ghz 32GB RAM NVME
$247.00
Dell PowerEdge R430 Server 2x E5-2680 V4 = 28 Cores H730 32GB RAM 2x 3TB SAS
$308.99