They were $15 each. My son has had his over a year, getting it for his birthday and promptly forgot about it. Another cheap but interesting gift that he quickly lost interest in.
Fast Forward a year, the swing set in the backyard snaps from stress and there are metal pieces all over about a 10' area. I don't want to mow them so I dig out his detector and find most if not all of them. Then I started playing around by gates etc in the yard and found a beat up washer, some nails etc.
Then both kids catch on to this, and the fun of it and decide to scan the whole yard. Our house was built in 1933, so there is a lot of stuff in the yard. They found old hand tools, gardening tools etc. So far nothing more than pennies in our yard, and nothing rare.
So then the playground and then the real fun begins when they started scouting out quarters under swings and slides. So my daughter had to buy her own and it kind of makes me want a real good detector with a discriminator so I won't dig up pull tabs from old soda cans(yes, I had to tell the kids what those were, they had never seen them.) I hope to find a 1933 $20 stashed somewhere, but doubt it. But a silver lining would be nice.