My 1st detector was the Whites Coinmaster II. My kids bought it for me because I was a coin collector. That was 21 yrs ago when they paid $158 new for it. For one thing, it was a killer on Indian Head pennies.....why?....I don't know (Found 16 the 1st yr). It is a great detector and I'll never sell the one I have, although I've upgrade twice during the recent years. I don't know what batteries the detector uses now, but mine takes (3) 9 volt batteries....a little expensive today at around $3-$4 each.....back then they were 50c each. I occasionally use it just for for the fun of it and in fact I used it for a few weeks when my present detector was being repaired. Go for it! I think a fair price for a used very good conditioned Coinmaster should be around $80 to $90. And a suggestion? Get headphones..... the sounds are so much better.