Shameless salesmanship, but I figure it has to be said:
When we launched the Kerio Firewall under our own name, we put in place an intro price of $14.95, a ridiculously cheap deal for a full-featured firewall. The offer ends on the 31st, at which point it goes up to $19.95 (still a great deal), so if you want it, grab a free download, do your eval and pick it up before the end of the month. Link to download page here.
Alex Eckelberry