ive listed a few very rare concert posters with iconic autions.
https://iconicauctions.com/catalog.aspx?auctionid=139&searchval...
theres are rare first printing signed concert posters

https://iconicauctions.com/The_Final_Shows_1975_Original_First_Prin...
Desirable original 26" x 18" c. 1975 first printing "The Final Shows' posters signed by Mick Fleetwood, John McVie, Christie McVie, Lindsey Buckingham & Allen Lanie. Overall in fine condition with minor handling wear to the edges & minor discoloration. This item has been reviewed by Beckett Authentication Services (BAS) and is guaranteed to pass their authentication. Full certification for this item can be acquired for an additional fee. Please contact our offices at 1-800-325-7127 or email us at Info@IconicAuctions.com for pricing and details.

https://iconicauctions.com/John_Fogerty_Signed_original_1969_First_...
John Fogerty stu and doug Signed original 1969 First Printing 21" x 14" Concert Poster (Beckett/BAS Guaranteed)
https://iconicauctions.com/Jeff_Beck_Rare_Signed_1968_First_Printin...

Jeff Beck Rare Signed 1968 First Printing Fillmore East 21" x 14" Concert Poster (CGC 9.2)

ai have many more listed by other artists

RACC TRUSTED SELLER # 220
RACCTrusted.com #220
please pm me if you have questions
I have tons of signed concert posters and programs ,guitars , if theres anyone particular ur looking feel free to ask . but I really never did newer groups in the 2000s so most of my stuff is classic rock on original posters programs and guitars .alots in storage