ever made. I was fortunate to have purchased one of the original Groundhogs, back in the 70's. I had a Garrett dealership back then, and visited with Charles Garrett on several occassions concerning the Groundhog. I'll tell you what.... that combination of VLF / TR was unbelievable. Once we implemented my reverse discrimination process, it was lethal!! You simply wouldn't believe the number of old silver coins and IH cents that my brother and I dug with our Groundhogs. To be honest, although I was a big fan of the original Groundhog, I didn't really like the toggle on the ADS model. Hunting with the earlier model, with that little pushbutton on the end of the handle, was "as good as it gets".
Anyway, back to your question, according to the ebay listing, the seller said that the speaker didn't work. But the needle moved. Did you try it with headphones?? I would suggest you give it a real good cleaning. Blow air through it and clean up the battery contacts. Get a copy of the manual and make sure you know how to set it up and use it. There are probably some guys out there that could take it a part and fix whatever is wrong. But before I did anything else, I would see if cleaning it might be all it needs. HH Randy