LOL, I remember now why I left TPF. Seriously? Someone actually broke out the "my four-year-old can do better?" line? You realize there is more to photography than L-lenses and "bokeh", right? Some people actually uses cameras to create art.
The art world is odd, I'll grant that gladly. But there are artists who have very specific vision, an EXTREMELY high level of craft, AND represent a certain school of expression. You would learn a LOT by understanding who Gursky is, and looking at his work. He is probably the most prominent photographer coming out of the Düsseldorf school, although I prefer Thomas Struth. Within that world, though not actual students of Bernd and Hilla Becher, are also Burtinsky and Misrach. They all have bodies of work that span 25+ years and are fully conceptualized, not just a cool snapshot that worked.
...but yeah, art world prices are hard to understand. Human vanities certainly play in to them... But not as a strategy to hide cash. A transaction that size comes with a receipt.