I have a walther CP5 which I purchased off a member of the BBS. He had replaced the battery but that had not fixed it. I repaired the electronic trigger and adjusted the solenoid and got it going. they are not as nice to shoot as a Steyr LP5 but it is still a lovely pistol.
I think people are put off by bulk filling Co2 which makes the CP pistols cheap although I did pay £250 ish each for both my CP2 and CPM-1.