GUEST, johnohenryo: Somebody is auctioning a Dolceola on Ebay now. Starting bid is $1500, and his Buy-It-Now price is $2200. Don't know if that's the "going rate" but it's what that guy wants for the instrument.

At the very least, the seller posted some nice pictures. Check 'em out.

YouTube has a couple of clips of Dolceola performances. One is the demo by Andy Cohen that open mike mentioned. Another is an audio of Washington Phillips singing "I Had a Good Father and Mother" (though he appears to be holding a different instrument in the photo posted with that clip): http://www.youtube.com/watch?v=27HIoSLkQ64