Official NBA game balls are preferred by collectors.
I can find specific or valuation data once I know your focus! larry bird memorabilia buying guide
Only buy signed items certified by PSA/DNA , JSA (James Spence) , or Beckett (BAS) . Official NBA game balls are preferred by collectors
1980s-era items hold value better than modern "insert" cards. JSA (James Spence)
His most iconic card (shared with Magic Johnson).
Green or white Celtics jerseys are the "holy grail."