Like most kids, I loved playing with Lego as a child. Like most kids, when making a model there was always some piece that eluded me for too long. What felt like hours to my 7 year old brain were spent scraping through the big box of all the combined sets, searching for a tiny block of the right colour and shape.
This guy had the same problem, but instead of living with it, he has meticulously separated and ordered all the blocks into colour, shape, type and so on. It's yours for $20,000.
Also, an aside of this is that once the blocks are separated into colour, they transform from simply being blocks of Lego into beautiful representations of colour and a lovely example of quality control and colour stability in pigmented plastics. Here are blocks made years apart, presumably in different factories, (even different countries) all exactly the same.