Magnemite

Magnemite (68/112), the Common from FireRed & LeafGreen, has an estimated ungraded market price of about $0.30. Note: 40 other cards named Magnemite exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Magnemite (68/112), the Common (about under $1) from FireRed & LeafGreen.

The other versions: #7/75 from Neo Discovery (Rare, about $25–$33); #242/236 from Cosmic Eclipse (Secret Rare, about $20–$27); #26/75 from Neo Discovery (Rare, about $14–$20); #52/147 from Aquapolis (Uncommon, about $9–$12); #91/147 from Aquapolis (Common, about $6–$8); #76/144 from Skyridge (Common, about $5–$7); #62/97 from Dragon (Common, about about $1); #66/109 from Team Rocket Returns (Common, about about $1); #63/97 from Dragon (Common, about about $1); #61/97 from Dragon (Common, about $0.80–$1); #53/102 from Base Set (Common, about $0.70–$1); #80/110 from Legendary Collection (Common, about under $1); #60/82 from Team Rocket (Common, about under $1); #68/102 from Triumphant (Common, about under $1); #59/92 from Legend Maker (Common, about under $1); #79/130 from Base Set 2 (Common, about under $1); #54/108 from Power Keepers (Common, about under $1); #74/113 from Delta Species (Common, about under $1); #67/100 from Stormfront (Common, about under $1); #66/100 from Stormfront (Common, about under $1); #111/147 from Supreme Victors (Common, about under $1); #43/135 from Plasma Storm (Common, about under $1); #87/130 from Diamond & Pearl (Common, about under $1); #34/131 from Forbidden Light (Common, about under $1); #51/162 from BREAKthrough (Common, about under $1); #42/135 from Plasma Storm (Common, about under $1); #58/236 from Unified Minds (Common, about under $1); #68/236 from Cosmic Eclipse (Common, about under $1); #52/162 from BREAKthrough (Common, about under $1); #081/165 from 151 (Common, about under $1); #058/191 from Surging Sparks (Common, about under $1); #105/189 from Astral Radiance (Common, about under $1); #81/156 from Ultra Prism (Common, about under $1); #063/198 from Scarlet & Violet (Common, about under $1); #065/193 from Paldea Evolved (Common, about under $1); #80/156 from Ultra Prism (Common, about under $1); #37/108 from Evolutions (Common, about under $1); #045/132 from Mega Evolution (Common, about under $1); #063/197 from Obsidian Flames (Common, about under $1); #SV27/94 from Hidden Fates Shiny Vault (Shiny rare).

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