Nidoking

Nidoking (29/111), the Rare from Rising Rivals, has an estimated ungraded market price of about $7.50, typically in the $7–$9 range. Note: 15 other cards named Nidoking exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Nidoking (29/111), the Rare (about $7–$9) from Rising Rivals.

The other versions: #150/147 from Aquapolis (Rare, about $440–$560); #H18/147 from Aquapolis (Holo Rare, about $200–$260); #11/130 from Base Set 2 (Rare, about $36–$47); #11/102 from Base Set (Rare, about $35–$45); #8/112 from FireRed & LeafGreen (Rare, about $24–$32); #174/165 from 151 (Illustration rare, about $18–$24); #24/147 from Aquapolis (Rare, about $14–$19); #31/110 from Legendary Collection (Rare, about $12–$16); #6/102 from Triumphant (Holo Rare, about $10–$14); #45/108 from Evolutions (Rare, about $4–$6); #34/132 from Secret Wonders (Rare, about $4–$5); #58/116 from Plasma Freeze (Rare, about $3–$4); #59/181 from Team Up (Rare, about about $1); #45/114 from Steam Siege (Rare, about $0.70–$1); #034/165 from 151 (Rare, about under $1).

The collector number printed at the bottom of the card is the reliable way to tell them apart.

Nidoking (29/111) is a Rare. PSA has graded 19 copies to date, so graded supply is measurable and growing.