Nazi pastoral sold for $615,000

Denver Nicks has a Time article about an expensive piece of (Rico uses the term loosely) art:

A painting by the artist Banksy sold at auction recently for $615,000. The piece, titled The Banality of the Banality of Evil (an homage to a book by writer and philosopher Hannah Arendt), features a Nazi soldier in full garb looking onto a serene mountain lake landscape.
At the website banksyny.com, which chronicles the street artist’s month-long residency in New York City, the artist describes the piece as “a thrift store painting vandalized, then re-donated to the thrift store.” Banksy bought the original oil painting by K. Sager for fifty dollars at a Housing Works thrift shop in Manhattan, then embellished it with the Nazi soldier sitting on a bench, before donating it back to the store on 29 October 2013.
Bidding started for the oil on canvas piece at $74,000.

Rico says he's not sure who would've bought it, or why...