Set
1991 SkyboxCard number
#559
Year
1991
Jon Koncak prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $1.59 | Buy on eBay ↗ |
| PSA 9 | $0.72 | Buy on eBay ↗ |
| Grade 9.5 | $1.00 | Buy on eBay ↗ |
| PSA 10 | $3.36 | Buy on eBay ↗ |
| BGS 10 | $4.00 | Buy on eBay ↗ |
| CGC 10 | $2.00 | Buy on eBay ↗ |
| SGC 10 | $2.00 | Buy on eBay ↗ |
Live on eBay
Affiliate — we may earn a commission1991 Skybox Jon Koncak #559 value & prices
The 1991 Skybox Jon Koncak #559 is a Basketball card released in 1991. Ungraded copies carry a market value of about $1.59.
An ungraded copy is worth around $1.59, a PSA 9 around $0.72, a PSA 10 (Gem Mint) around $3.36 and a pristine BGS 10 around $4.00. The gem-mint premium is modest (about 2.1× raw), so condition matters here but doesn't completely define the price.
Is it worth grading?
The spread between raw ($1.59) and top-graded ($3.36) copies is fairly tight, so grading this card only makes financial sense for truly flawless copies — or for collectors who simply prefer slabbed cards for protection and display.
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