People who know concert picks, know where these came from. They aren't produced or sold in stores anywhere, only to be obtained at the concerts. Do some online research and you will see for yourself.
I am a concert buff to for I work for livenation for 15 yrs. And also lived in N.Yand seen Cheap Trick at a bar for only $ 2.00 ladies nigjt yrs ago . They were great !! Good luck with ur auction.