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
SuperMicro SuperServer 5038MR-H8TRF Blade w/X10SRD-F Board E5-2630v3 Proc 128GB
$263.96
HP ProLiant MicroServer Gen8 G8 G2020T 8GB RAM 4x 1TB HDD 4x 3.5" 712318-421
$279.99
TRUNAS ZFS Server 2U 12 Bay SUPERMICRO X10DRU-i+ 2x E5-2676 V3 14C 32GB RAM SAS3
$419.00
HP ProLiant MicroServer Gen8 Desktop Computer Intel Core i3-3240 8GB Ram
$224.99
HPE ProLiant MicroServer Gen10 Plus v2 Ultra Micro Tower Server - 1 x Intel Xeon
$846.48
HP Proliant HSTNS-5151 Microserver (618364-005) NO HARD DRIVES - WORKS
$149.99
DATTO-1000 Mini PC Micro Server 8GB RAM
$67.48
1U Supermicro Firewall Router Jumpbox 6x 10GB Ethernet E3-1270 V3 32GB RAM 2x PS
$235.00
1U Supermicro Server X10DRU-i+ 2x Xeon E5-2676 V3 12 Core 32GB 4x 10GBE-T 2PS
$249.00