I know just a little about Elmer Chickering because I was watching a Elmer Chickering cabinet photo recently and did a bit of homework on it before the price went way above my budget.
Elmer Chickering was THE photographer in Boston in his day. I think he photographed most of the Boston players and teams.
Here's a thread from 2012
https://www.net54baseball.com/showthread.php?t=160799
I can't tell you if $8K represents good value for that cabinet or not. But it's one heck of a cool photo.