Steelix

Steelix (125/214), the Rare from Lost Thunder, has an estimated ungraded market price of about $2–$3. Note: 22 other cards named Steelix exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Steelix (125/214), the Rare (about $2–$3) from Lost Thunder.

The other versions: #H23/147 from Aquapolis (Rare, about $260–$340); #H29/144 from Skyridge (Rare, about $155–$210); #87/95 from Unleashed (Rare PRIME, about $95–$130); #15/111 from Neo Genesis (Rare, about $90–$125); #35/147 from Aquapolis (Rare, about $75–$105); #31/144 from Skyridge (Rare, about $60–$85); #208/182 from Paradox Rift (Illustration rare, about $36–$47); #23/100 from Sandstorm (Rare, about $22–$29); #247/236 from Cosmic Eclipse (Secret Rare, about $16–$22); #79/116 from Plasma Freeze (Rare, about $14–$18); #38/130 from Diamond & Pearl (Rare, about $13–$17); #28/100 from Stormfront (Rare, about $13–$17); #150/132 from Mega Evolution (Illustration rare, about $8–$10); #24/95 from Unleashed (Rare, about $4–$5); #89/168 from Celestial Storm (Rare, about $2–$3); #139/236 from Cosmic Eclipse (Rare, about about $1); #104/236 from Unified Minds (Rare, about under $1); #99/163 from Battle Styles (Holo Rare, about under $1); #139/264 from Fusion Strike (Holo Rare, about under $1); #044/78 from Pokémon GO (Uncommon, about under $1); #125/182 from Paradox Rift (Rare, about under $1); #093/132 from Mega Evolution (Rare, about under $1).

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