This has been used, tested and is in great condition.
Here are the specs on this thing.
* Maximum Performance and Capacity(1): 10 User
* Firewall performance: 75 Mbps
* 3DES performance: 20 Mbps
* Deep Inspection performance: 75 Mbps
* Concurrent sessions: 2,000
* New sessions/second: 2,000
* Policies: 100
* Interfaces: 5 x 10/100 Base-T
* Antivirus: Embedded Scan Engine
* Antivirus signatures: >80,000
* Protocols: (POP3,SMTP,HTTP, IMAP, FTP)
* HTTP: Webmail only
* Maximum AV Users 10 or 25(3)
* Automated Pattern file updates: Yes
* Safety Certifications: UL, CUL, CB, TUV
* EMC Certifications: FCC class B, CE class B, C-Tick, VCCI class B
* Operational temperature: 23° to 122° F, -5° to 50° C
* Non-operational temperature: -4° to 158° F, -20° to 70° C
* Humidity: 10 to 90% non-condensing
* MTBF: NetScreen-5GT: 8.5 years
* Security: ICSA Firewall and VPN