Original A Chorus Line Collectibles

Hi i am trying to find info on value/how best to find the right collector for some rare A Chorus Line items including the long-format poster described below (found in someone's 2011 post)... Please forgive me if this is the wrong place, and thank you in advance for your help. Dad was in the original orchestra and is on a limited budget so i am trying to help him stretch dollars... while holding onto memories. (I love the show and all the original souls who created it.)

Pictures available.

"HUGE, long limited edition multi-cast photo A CHORUS LINE posters created when the show became the longest running show on Broadway. I know these are (rare)"...

I don't know from Ebay or what items sell for in these days, but I want to point out that the iconic black t-shirts with the OBC in line in a white silhouette across the chest were like Congressional Medals of Honor in the mid-1970s. You had to work the show to get one.

It was before live theaters realized how much money was to be made from merchandise and those black Ts (and also the jackets, IIRC) were not sold to the public. At least not for the first few years. They should be worth more than later shirts and jackets sold in lobbies.