Chapters
00:00 - 01:14: Introduction
01:15 - 02:08: Ken Griffey Jr. Signing History
02:09 - 05:46: Sales History
05:47 - 13:23: Submissions
13:24 - 16:05: Analysis
Research
Google Sheets Spreadsheet of 44 of the first 46 1989 Upper Deck Ken Griffey Jr. PSA 10/DNA 10 cards: docs.google.com/spreadsheets/...
Mill Creek Sports Website, all Ken Griffey Jr. Auto Cards: www.millcreeksports.com/cards...
4 Sharp Corners Website, all Ken Griffey Jr. Cards:
4sharpcorners.com/search/sear...
PSA Pop Report for 1989 Upper Deck Ken Griffey Jr. DNA Auto cards (must click PSA/DNA Certified Tab):
www.psacard.com/pop/baseball-...
PSA Certification Verification Page: www.psacard.com/cert
Dec. 2017 article saying Griffey signed with Tri-Star:
blowoutbuzz.wordpress.com/201...
March 2018 Sports Collector’s Digest article saying Griffey no longer signs:
sportscollectorsdigest.com/au...
2018 promo from Powers Sports Memorabilia saying this was the first time Griffey did mail order signings:
powerssportsmemorabilia.com/b...
2018 private mail in signing: / 1714475231991137
Tristar Private Signings for Ken Griffey Jr.: www.tristarproductions.com/Gr...
PWCC Sales Archive of 1989 Upper Deck Ken Griffey Jr. PSA 10 auto card:
sales-history.pwccmarketplace...
January 2021 Collectors Universe Discussion Forum on first big sale, $55,000 with PWCC: forums.collectors.com/discuss...
Detailed Explanation of the 9:10 Ratio for PSA Graded Sports Cards:
• PSA's Pop Control of t...
7 июл 2024