Someone who was a child of the 80's now has money and wants an iconic car from the movie where he first saw boobs. More than one, since there were multiple bidders.
For context:
Batmobile - $4m
Ferris Bueller Fauxarri - one of the three(?) - $400k
Shit that Steve McQueen drove always brings huge money.
1970 911 driven in the opening scene of Le Mans - $1.4m (mint non McQ is worth <10% of that).
GT40 used as a camera car in the same film - $11m (most recent GT40 sold for $3.5)
Porsche 962 driven by McQ in the same movie - $14m in 2017, didn't meet reserve this summer
Porsche 930 Turbo not used in any film - $2m in 2015
Also, the collector car market has gotten RED HOT over the past 10 months. Just my run of the mill Porsche 993 has more than doubled in value.