You can "buy it now" on ebay with various stuff thrown in for $49.00.
I got AHP and all the plugs, a socket rocket, two credit card remotes, and a CM15A for that $49.00!
That is a good deal.
Every once in a while X10 has a "scratch and dent" sale, with CM15A and all plug-ins for $30. I sprung for one just to get the plug-ins and a back-up CM15A, although I only use a CM15A for the 16 house code tranceiving ability.
Our home automation is driven by Homeseer and an ACT TI103. I really like Homeseer, although I have to admit AHP has come a long way since the original release. Had I known X10 would have got AHP stable and BVC would have come along, I probably would not have spent the 250 beans for Homeseer and the ACT interface back in 2005. No regrets however because like Dave_X10 says, this is a fun. My guess is Dave is one of the few that is really using AHP "for all its got".