The Psychedelic Art Exchange’s vintage concert poster auction, online now and ending Thursday, May 10th at 9 pm Eastern, features 210 rare, highly collectible handbills and posters that are being sold without reserve and with a one dollar starting bid per lot. Also, all of the lots have been independently authenticated and graded by CGC. Expected top lots include a Grateful Dead “Acid Drop” poster, a Grande Ballroom “Zebra Man” poster, a Grateful Dead “Angry Arts” poster, a The Who “Boston Tea Party” poster and an Andy Warhol BG-8 handbill – all the finest CGC graded examples ever to appear at auction.