Called “Rumble”, this gorgeous sidecar rig was built by Dan Stern and is powered by a 2004 H-D Softail. Work started in 2004 and it made its public debut at The One Motorcycle Show in Portland in 2021.
The seller doesn’t share much information in the listing but he understandably links to two great articles so I’ll do the same:
Rumble On! on American Rider
Art Inspired Rumble Sidecar Project on Bikernet
Beyond that, the bike has just 88 miles on it. Find this custom Harley hack for sale in Lafayette, California with a BIN of $67,000 or best offer here on eBay.