Altaria

Altaria (152/149), the Secret Rare from Boundaries Crossed, has an estimated ungraded market price of about $130–$170. Note: 21 other cards named Altaria exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Altaria (152/149), the Secret Rare (about $130–$170) from Boundaries Crossed.

The other versions: #1/107 from Deoxys (Rare, about $65–$90); #2/97 from Dragon (Rare, about $50–$70); #2/108 from Power Keepers (Rare, about $23–$30); #RC24/83 from Generations (Uncommon, about $14–$19); #12/106 from Great Encounters (Rare, about $14–$18); #2/102 from Triumphant (Rare Holo, about $10–$13); #GG19/70 from Crown Zenith Galarian Gallery (Rare, about $9–$11); #92/113 from Legendary Treasures (Uncommon, about $7–$9); #40/70 from Dragon Majesty (Rare, about $6–$8); #TG11/30 from Silver Tempest Trainer Gallery (Holo Rare, about $6–$8); #74/108 from Roaring Skies (Rare, about $5–$7); #18/127 from Platinum (Rare, about $4–$6); #84/124 from Dragons Exalted (Rare, about $3–$4); #80/111 from Crimson Invasion (Rare, about under $1); #53/108 from Roaring Skies (Uncommon, about under $1); #143/195 from Silver Tempest (Uncommon, about under $1); #160/197 from Obsidian Flames (Uncommon, about under $1); #134/191 from Surging Sparks (Uncommon, about under $1); #106/203 from Evolving Skies (Rare, about under $1); #49/73 from Champion's Path (Holo Rare, about under $1); #SV37/94 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.