I saw this last week-end at the Jazz à Liège festival. At the time, I wondered why some guy watching TV was among the other musical sculptures. Then I checked out
Jazz Riff. Only 1370 euros!
There's also a nice one of Paul Lovens. A mere 620 euros.
My favourite isn't on the website, though. One of a pianist completely bent over his instrument. The piano is only evoked through a few keys on a sort of curled bar. Hard to describe, but looked really good. If I had the money for this sort of thing, I would've bought it.