Commercial firewalls overpriced for what you get?

Anthony Walters writes: "We recently did some traffic throughput testing on an OpenBSD server firewall using 'nttcp' and I would like to ask slashdot readers firstly if anyone has performed similar tests on commercially available firewalls and what sort of throughput they measured, and secondly if they think that expensive commercial firewalls are overpriced? We found that at worst case on the OpenBSD firewall, with a packetfilter rulebase loaded, we got a throughput of about 850Mb/s. Which means that, when disk I/O and protocol overheads are eliminated as much as possible, an 800MB file would get transferred in under 8 seconds. More details on the test setup and results can be found here"