Just six years after it was last sold.
Back in 2001, the retro automotive trend was still very much in its upswing, its unfocused nature in these earlier days could be the subject of an entire other article, but the end result of this thinking was Buick's Blackhawk concept. The concept was a bit of a hodge-podge of eras and ideas, but these largely come from the late 30s and early 40s. The styling is obviously a love/hate kind of thing, but it is uncompromising in a way that Buick is hardly known for.
It was powered by a circa 1970 455cu-in (7.5-liter) V8 which made 465 horsepower. The car was made specifically to participate in the Woodward Dream Cruise, but you may have also spotted it being driven by Will Smith in "Bad Boys II". The car sold at auction in 2009 for about a half million dollars and will now be going up for auction again. It is listed as a 1996 model, despite being built in 2001, but this is not an error. Needing the car to be street legal, Buick used a donor car, in this case a 1996 Riviera, one of the only other examples of Buick's styling department taking a chance.