Esika is in a similar position to Tergrid. It has a very strong effect, but the one only a few niche decks would want to play, and only in commander. Other formats will rarely rely on its abilities.
The showcase art looks strong and shares the same market position as Tergrid's showcase art, both foil and non-foil prints. But Esika's effect isn't new either unlike that of Tergrid's, which should pull her price even lower.
If this card doesn't break out in some remarkable way in standard or modern, then don't expect it to go anywhere higher than $3-4 a piece.