2006 Topps CO Signers Dual Autograph Brandon McCarthy / Zach Duke #CS-56
2006
See all Brandon McCarthy / Zach Duke cards & values$3.61est. value (ungraded)
Prices updated 2026-11-04
Based on recorded sold prices how we price cards
Price by month
Average price of the 2006 Topps CO Signers Dual Autograph Brandon McCarthy / Zach Duke #CS-56 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 |
|---|---|---|---|
| Nov 2026 | Market value | $3.61 | — |
Brandon McCarthy / Zach Duke prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $3.61 | Buy on eBay ↗ |
| PSA 8 | $9.61 | Buy on eBay ↗ |
| PSA 9 | $17.69 | Buy on eBay ↗ |
| Grade 9.5 | $30.82 | Buy on eBay ↗ |
| PSA 10 | $64.20 | Buy on eBay ↗ |
| BGS 10 | $83.00 | Buy on eBay ↗ |
| CGC 10 | $26.00 | Buy on eBay ↗ |
| SGC 10 | $39.00 | Buy on eBay ↗ |
Live on eBay
Affiliate — we may earn a commission2006 Topps CO Signers Dual Autograph Brandon McCarthy / Zach Duke #CS-56 value & prices
The 2006 Topps CO Signers Dual Autograph Brandon McCarthy / Zach Duke #CS-56 is a Baseball card released in 2006. Ungraded copies carry a market value of about $3.61.
An ungraded copy is worth around $3.61, a PSA 9 around $17.69, a PSA 10 (Gem Mint) around $64.20 and a pristine BGS 10 around $83.00. That's roughly a 18× 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 $3.61 and top grades reaching $64.20, 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.