Espeon can use the attacks of all Pokémon you have in play that evolve from Eevee as its own. (You still need the necessary Energy to use each attack.)
Attacks
30Solar Ray
Remove 1 damage counter from each of your Pokémon.
How much is Espeon #81/90 worth?
Espeon #81/90 is a Rare Prime card from HS—Undaunted (2010) — today it trades at roughly $463.17 ungraded.
Grading changes the math on this one: a PSA 10 is valued around $15,308.77, roughly 33.1x the raw price, while a PSA 9 sits near $1,475.00. 3,093 copies have been graded to date, and 2% of them came back a 10 — worth knowing before you pay grading fees.
Prices on this page refresh nightly from live TCGplayer market data and are cross-checked against actual sold prices, so a single inflated listing never becomes "the price". The chart above has the full history.