Umbreon

Umbreon (120/214), the Rare from Lost Thunder, has an estimated ungraded market price of about $16–$21. Note: 16 other cards named Umbreon exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Umbreon (120/214), the Rare (about $16–$21) from Lost Thunder.

The other versions: #H29/147 from Aquapolis (Rare, about $1,100–$1,425); #86/90 from Undaunted (Rare PRIME, about $440–$570); #13/75 from Neo Discovery (Rare, about $340–$450); #41/147 from Aquapolis (Rare, about $300–$400); #32/144 from Skyridge (Rare, about $240–$320); #24/100 from Sandstorm (Rare, about $175–$230); #10/90 from Undaunted (Rare Holo, about $175–$230); #32/75 from Neo Discovery (Rare, about $175–$230); #22/95 from Call of Legends (Rare Holo, about $150–$195); #H30/144 from Skyridge (Rare, about $120–$155); #64/116 from Plasma Freeze (Rare, about $110–$150); #61/108 from Dark Explorers (Uncommon, about $85–$115); #60/108 from Dark Explorers (Uncommon, about $80–$105); #32/100 from Majestic Dawn (Rare, about $75–$105); #130/197 from Obsidian Flames (Uncommon, about $2–$3); #059/131 from Prismatic Evolutions (Rare, about under $1).

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