Good for playing in the streets, busking, this B3 Theremin switches from battery power to plug-in. It comes with a very portable telescoping tripod and a Danelectro HoneyTone N-10 Mini Amp. The batteries are contained in three Radio Shack gang setups wired in series--all very simply arranged by me. For the amp, use a separate battery. The whole package for $150. Email me at fintushel@gmail.com.
(I also have available, if you're interested, a Line 6 DL4 delay modeler [the green box Pamelia Kurstin always used] along with plug-in power source--$120)
 