Valuable Grateful Dead Artifacts Go Up For Auction

UNION, IL - MARCH 27: Shawnah Donley holds Stanley Mouses original artwork for the 1966 Golden Road to Unlimited Devotion Grateful Dead Fan Club poster with photo by Herb Greene as it is prepared for Auction on March 27, 2015 in Union, Illinois. The item, with an opening bid of $420,000 and an auction estimate of $1.5 million, will be auctioned with a trove of Grateful Dead artifacts on August 11 and 12 by Donley Auction Services in Union. (Photo by Scott Olson/Getty Images)