General Knoppix support for those who've read the FAQ at the Wiki
Dell X1018 X-Series Smart Managed Switches 16-Port Gigabit 2-Port SFP Switch
$42.00
Cisco Nexus 9300 48-Port 25GbE SFP 6x100GbE QSFP Switch P/N: N9K-C93180YC-EX
$499.99
Cisco Catalyst WS-C2960X-24PS-L 24 Port Managed Gigabit Ethernet Network Switch
$59.99
Cisco Catalyst WS-C3650-24PS-L 24-Port Gigabit Ethernet Network Switch TESTED
$49.99
Dell PowerConnect 6224 Rackmount 24-Port Gigabit Managed Ethernet Network Switch
$31.99
TP-Link Metal 8-Port Gigabit Ethernet Switch Fanless Unmanaged L2+ TL-SG108(UN)
$15.00
NEW TP-Link TL-SG108PE 8-port Gigabit PoE+ Swith w/ 4-port PoE -RES LLC STORE-
$49.50
TP-LINK TL-SG108 8-Port Switch 10/100/1000Mbps Switch
$15.00
Cisco Small business SG300-28P Managed 28 Port Gigabit Ethernet Switch
$67.95
Netgear ProSafe GS752TP 52-Port Gigabit PoE Smart Switch with 4 SFP Ports (GP)
$107.96