General Knoppix support for those who've read the FAQ at the Wiki
FORTINET FortiGate60F+1YR Forticare UTP Unregistered(FG-60F-BDL-950-12)-Open Box
$254.25
Fortinet Fortiwifi 60D FG-60D Security Appliance Firewall / VPN w/ AC Adapter
$34.97
Fortinet Fortigate FG-61E Firewall Network Security Appliance ATP Bundle 1 years
$299.99
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
Cisco ASA 5505 Adaptive Security Appliance ASA5055 V09
$17.99
Palo Alto PA-220 Next-Gen Firewall
$57.19
ADVANTECH FWA-2320 6 PORT FIREWALL VERSA FLEXVNF SD-WAN 128GB SSD 16GB RAM
$119.00
Firewall pfSense 2.7.2 Release 8GB Memory - Dual NIC 1 GB - 120GB intel SSD
$105.77
Fortinet FortiGate 60F FG-60F Network Security Firewall Appliance
$199.99