General Knoppix support for those who've read the FAQ at the Wiki
1U BareMetal pfsense opnsense Router Firewall DNS Server 6x 10GB Ethernet Ports
$149.00
1U Supermicro Server 10 Bay 2x Intel Xeon 3.3Ghz 8C 128GB RAM 240GB SSD 2x 10GBE
$259.00
HP ProLiant MicroServer Gen8 Server Xeon E3-1220L 8GB RAM No HDD's
$229.99
HP ProLiant MicroServer Gen8 Server Xeon E3-1220L 16GB RAM No HDD's
$224.99
HP HPE Microserver Gen 7 8 9 iLO 2/3/4/5Advanced License Lifetime Key| FAST SHIP
$10.00
SuperMicro Server 505-2 Intel Atom 2.4GHz 8GB RAM SYS-5018A-FTN4 1U Rackmount
$202.49
SuperMicro SuperServer E101-40 E100-9APP Pentium N4200 8GB RAM 150GB SSD Server
$114.97
HP ProLiant MicroServer HSTNS-5151
$59.99
Supermicro X7SLA Server Atom CPU 330@1.6GHz 2GB Ram 1U RACKMOUNT
$60.00
2U 12 Bay SAS3 SuperMicro Server 6028U-TR4T+ W/ X10DRU-i+ Barebone 12 Caddy RAIL
$299.00