So whats the deal with unpublished coins

PISIDIA. Isinda. Ae (1st century BC). Ae.
Obv: Hermes Head wearing petasos. Kerykeion behind.
Rev: ΙΣ-ΙΝ. Trident.
Weight 2,50 gr - Diameter 10 mm.

Hello all, so I recently bid on this coin that was labelled by the auction house as "apparently unpublished".
I am new to greek city state coinage so I am not an expert or have any reference material for these types of coins. I dont see it included on wildwinds, but then again, not all coins exist on wildwinds if im not wrong.

What do you guys think of this and what is usually the deal with unpublished coins, towwards "publishing" them.