John Bowker Autographs
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Current items with a signature of John Bowker
These are the most current items with a signature of John Bowker that were listed on eBay and on other online stores - click here for more items.
| Picture | Item Title | Price | Store |
 | John Bowker Signed Baseball Official MLB Ball Autograph Rawlings Giants | $29.99 |  |
Traded items with a signature of John Bowker
The most expensive item with a signature of John Bowker (2004 Upper Deck SP Prospects #373 John Bowker Platinum Autograph 1/1) was sold in August 2025 for $204.95 while the cheapest item (John Bowker - 2008 Topps Stadium Club Rookie Autograph RC Auto SF Giants) found a new owner for $0.01 in November 2023. The month with the most items sold (6) was April 2008 with an average selling price of $18.49 for an autographed item of John Bowker. Sold items reached their highest average selling price in August 2025 with $204.95 and the month that saw the lowest prices with $0.01 was November 2023. In average, an autographed item from John Bowker is worth $3.99.
Most recently, these items with a signature of John Bowker were sold on eBay - click here for more items.
| Picture | Item Title | Price | Store |
 | 2004 fleer hot prospects, John Bowker auto autograph rookie card /299 | $3.50 |  |
| 2004 San Francisco Giants Signed Baseball TODD LINDEN Jim Brower JOHN BOWKER | $16.00 | |
| 2004 San Francisco Giants Signed Baseball TODD LINDEN Jim Brower JOHN BOWKER | $16.00 | |
| 2004 Upper Deck SP Prospects #373 John Bowker Platinum Autograph 1/1 | $204.95 | |
| 2007 Bowman Signs of the Future Autograph #SOF-JBB JOHN BOWKER Auto RC | $2.49 | |
| 2007 Bowman Signs of the Future Autograph #SOF-JBB JOHN BOWKER Auto RC | $1.99 | |
 | 2008 Allen & Ginter's #99 Padres John Bowker Auto/ Signed IP | $11.24 | |
| 2008 Topps John Bowker San Francisco Giants Auto On Card Signed Autographed | $11.96 | |
| Giants John Bowker Signed Autographed 2005 Just Minors AZL Giants Nr.Mint | $4.45 | |
| John Bowker - 2008 Topps Stadium Club Rookie Autograph RC Auto SF Giants | $0.01 | |
| John Bowker 2007 Signs of The Future Autograph Signed Giants | $9.00 | |
| JOHN BOWKER 2008 Topps Stadium Club AUTOGRAPH #160 - NM/MT - Giants | $2.98 | |
| John Bowker San Francisco Giants Signed 12x18 Glossy Photo JSA Authenticated | $44.99 | |
| John Bowker Signed 2006 Bowman Heritage Baseball Card #BHP42 RC Auto Giants | $9.99 | |
| John Bowker Signed In Person 2008 Topps Heritage Rookie Stars Of 2008 Rc A8 | $25.00 | |
