1999 SP Signature Autographs Ken Griffey Jr. #Jr.
1999
See all Ken Griffey Jr. cards & values1999 seasonSeattle MarinersKen Griffey Jr. career & card values
$347.00est. value (ungraded)
Prices updated 2026-10-22
Based on recorded sold prices how we price cards
Price by month
Average price of the 1999 SP Signature Autographs Ken Griffey Jr. #Jr. each month, from 1 recorded price reading. Prices are re-checked regularly; a month's average counts each day from that month's first reading at the price that held that day.
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $347.00 | — |
Ken Griffey Jr. prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $347.00 | Buy on eBay ↗ |
| PSA 8 | $1,005.00 | Buy on eBay ↗ |
| PSA 9 | $1,799.00 | Buy on eBay ↗ |
| Grade 9.5 | $1,979.00 | Buy on eBay ↗ |
| PSA 10 | $4,424.45 | Buy on eBay ↗ |
| BGS 10 | $5,752.00 | Buy on eBay ↗ |
| CGC 10 | $2,655.00 | Buy on eBay ↗ |
| SGC 10 | $1,247.00 | Buy on eBay ↗ |
Live on eBay
Affiliate — we may earn a commission1999 SP Signature Autographs Ken Griffey Jr. #Jr. value & prices
The 1999 SP Signature Autographs Ken Griffey Jr. #Jr. is a Baseball card released in 1999. Ungraded copies carry a market value of about $347.00.
An ungraded copy is worth around $347.00, a PSA 9 around $1,799.00, a PSA 10 (Gem Mint) around $4,424.45, a pristine BGS 10 around $5 and752.00. That's roughly a 13× premium for a gem-mint copy over raw — one of the clearest signals that condition-sensitive buyers dominate this card's market.
Is it worth grading?
With raw copies near $347.00 and top grades reaching $4,424.45, grading a sharp copy of this card can clearly pay for itself — the spread comfortably covers a typical ~$25.00 grading fee. The catch: only submit copies with strong centering, clean corners, and unmarked surfaces, because anything below a 9 usually erases the math.
More from 1999 SP Signature Autographs
Other Ken Griffey Jr. cards
