Bought this at a yard sale for $20. Guy mumbled something about not having speakers or not using an Amp. Turned out the 25 yr old internal button battery was dead. Took me about 30 min to replace with a button cell holder and CR2032 battery. Bought a stand for $10 at the flea mkt.
After setting it up had to DL the manual to get it programmed and playable. Sounds fantastic!