This would really be in big demand. Why didn't he sell any? Nevermind. Google shows several websites that for $25 you can get Tesla's plans, along with 99 other "free-energy" projects. Why don't you send in your $25 and build a few. Then get back with us.
A few years later, George Westinghouse stopped funding Tesla's research when Tesla showed him that he could offer free electricity to the whole world by simply "ramming a stick in the earth in your backyard".
Man! Y'all (Junior) tell me to go to Wikipedia, so I do and I STILL get ridiculed!
Musta been the moon thing, huh?
OK, I take that one back. ;-)