2025-26 Topps Cosmic Chrome Galaxy Greats John Stockton Purple Nebula Refractor #GG-21

2025-26 Topps Cosmic Chrome Galaxy Greats John Stockton Purple Nebula Refractor #GG-21 value & prices

The 2025-26 Topps Cosmic Chrome Galaxy Greats John Stockton Purple Nebula Refractor #GG-21 is a Basketball card (Purple Nebula Refractor parallel) released in 2026. Ungraded copies carry a market value of about $7.31.

An ungraded copy is worth around $7.31, a PSA 9 around $19.70, a PSA 10 (Gem Mint) around $57.64 and a pristine BGS 10 around $75.00. That's roughly a 7.9× 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 $7.31 and top grades reaching $57.64, 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.