Blue Sentinel (Alternate Art).

What moves the price of this card

The Blue Sentinel (Alternate Art) on this page is the Foil printing from Unleashed, and it trades at $6.23 in near mint condition. The same name is on 2 other printings: Riftbound Judge Promotional Cards 087/219 at $362.29, Unleashed 087/219 at $3.50, so read the set, the number and the rarity together before comparing prices.

Condition does most of the work below the surface. A copy with soft corners or a print line off centre trades well under the market price shown here, and a copy clean enough to grade trades well above it. Before you value your own copy, look at the corners under a light and check the centring on the back, where most cards give themselves away.