General Knoppix support for those who've read the FAQ at the Wiki
Fortinet FortiGate 60F | 10 Gbps Firewall Network Security EXPIRED (FG-60F)- New
$251.99
SONICWALL TZ270 Network Security Base Appliance Only (02-SSC-2821) - Open Box
$186.87
FORTINET FORTIGATE 40F Next GEN Firewall Network Security EXPIRED (FG-40F)- New
$179.99
Palo Alto PA-220 Next-Gen Firewall 750-000128-00A w/ Power adapter
$68.00
Netgate SG-3100 pfSense Security Gateway Firewall Appliance w/Power Adapter
$150.00
Netgate SG-3100 Network Security Appliance PfSense Plus Multi Wan Firewall
$98.92
3 Pack Firewall Boot Universal - Bundle of 3 Boots
$13.54
Fortinet Fortigate-50E Network Security Firewall Initialized FG-50E w/Adapter
$42.70
FORTINET FortiGate60F+1YR Forticare UTP Unregistered(FG-60F-BDL-950-12)-Open Box
$254.25
FORTINET FORTIGATE 40F Next GEN Firewall Security Unregistered (FG-40F)-Open Box
$140.79