Mareep

Mareep (75/214), the Common from Lost Thunder, has an estimated ungraded market price of about $4–$6. Note: 22 other cards named Mareep exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Mareep (75/214), the Common (about $4–$6) from Lost Thunder.

The other versions: #62/115 from Unseen Forces (Common, about $44–$60); #119/165 from Expedition Base Set (Common, about $38–$49); #93/147 from Aquapolis (Common, about $34–$44); #67/109 from Team Rocket Returns (Common, about $30–$40); #82/127 from Platinum (Common, about $18–$24); #64/97 from Dragon (Common, about $12–$16); #GG34/70 from Crown Zenith Galarian Gallery (Rare, about $11–$15); #63/95 from Call of Legends (Common, about $8–$11); #73/123 from HeartGold SoulSilver (Common, about $5–$7); #75/105 from Neo Destiny (Common, about $4–$6); #94/132 from Secret Wonders (Common, about $4–$5); #65/111 from Neo Genesis (Common, about $3–$4); #58/75 from Neo Discovery (Common, about $3–$4); #38/124 from Dragons Exalted (Common, about about $1); #41/181 from Team Up (Common, about under $1); #38/114 from Steam Siege (Common, about under $1); #76/214 from Lost Thunder (Common, about under $1); #55/189 from Darkness Ablaze (Common, about under $1); #47/198 from Chilling Reign (Common, about under $1); #54/203 from Evolving Skies (Common, about under $1); #066/198 from Scarlet & Violet (Common, about under $1); #027/86 from Chaos Rising (Common, about under $1).

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