
It would be great to own one, tho - playing it's keyboard (a very strange-looking round keyboard) rubs the strings like a violin bow, so it's like having a string quartet at your fingertips. A scant 3 1/2 minutes of music on Wheelharp has all that's been recorded so far, but it is very nice indeed:
https://soundcloud.com/antiquitymusic/sets/wheelharp-audio-samples
Apparently it was used in the soundtrack for a recent film called "Devil May Call," but there does not appear to be a recording available.