Heatran

Heatran (25/189), the Holo Rare from Darkness Ablaze, has an estimated ungraded market price of about under $1. Note: 13 other cards named Heatran exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Heatran (25/189), the Holo Rare (about under $1) from Darkness Ablaze.

The other versions: #97/100 from Stormfront (Rare Holo LV.X, about $50–$70); #6/146 from Legends Awakened (Rare Holo, about $7–$10); #3/99 from Arceus (Rare Holo, about $3–$4); #30/146 from Legends Awakened (Rare, about about $2); #98/168 from Celestial Storm (Rare, about under $1); #48/214 from Lost Thunder (Rare, about under $1); #63/119 from Phantom Forces (Rare, about under $1); #13/131 from Forbidden Light (Rare, about under $1); #88/156 from Ultra Prism (Rare, about under $1); #123/167 from Twilight Masquerade (Rare, about under $1); #100/172 from Brilliant Stars (Rare, about under $1); #007/84 from Pitch Black (Uncommon, about under $1); #068/131 from Prismatic Evolutions (Uncommon, about under $1).

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