Wikipedia has a list of most expensive photographs
There are only 4 sold privately and all four are Peter Lik's. Strange coincidence.
My understanding is that for private sales it's impossible to verify that they were really sold for the specified price.
Coming from high end nikion DSLRs I new what to expect. I compared two cameras: Panasonic DMZ-FZ150 and Sony HX-200v
The most annoying freatures of this poorly designed Sony:No thread for filters so lens is unprotectedNo lens hood Quality of 18 MP is worse than Panasonic 12 MPEasy to screw up setting and take sketches instead of pictures in the bright light. Everything through a multi step menu. And the worst: it takes forever: several seconds to take next picture.
So without a second hesitation I returned Sony and kept Panasonic.