Art Collectible Quarters

Hello all

I just came from local coin shop and the guy had two albums full of art collectible quarters. These coins ( if you can call them that) are the diameter of a quarter, .999 silver, weigh over 9 tenths of an ounce and are 3D. On the face all details are raised up about 1/4 inch and they have presidents on them, one had Thomas Edison. I just wondered if anyone has seen these and had any idea of what they are worth? He got them in a large collection and is talking about sending them to smelter. He will probably sell them to me for just under silver value. I went in to pick up 3 Franklin's he had for me and walked out over $1,000 lighter.

Thanks Sam