Question I'm trying to find the value of a team autographed basketball by the Boston Celtics that includes Larry Bird, Reggie Lewis, Chris Ford and other team players
Answer Mike,
autographed basketballs' value depends on the material they are made of (leather ones are the most valuable), on the fact that they are certificated (or not) and on th eplayers/coaches who signed them.
I have seen certified leather made basketballs signed by the 80's edition of the Celtics range from 700 to 1500 $.
I suggest you check on Ebay and see the actual value of similar memorabilia.