That's the truth.
Same old story. People are prepared to spend heaps on the PC and not even a measly R400 odd on a router.
Sure, if you configure your Linux installation correctly it is an effective firewall, but I find it strange then that the companies I work at, they all use routers, hardware ones (Cisco mostly) on links that have 1/6th the throughput of an iBurst line. The only outfit that uses a Linux firewall (running on a SBC) is a small ISP in Pretoria, and they're looking to replace it.