No, that wouldn't seem like an okay deal. You can get 12 packs of those for like 12 dollars:

https://www.amazon.com/Maverick-Standard-Playing-Blackjack-Pinochle/dp/B07YYS5VMK/ref=mp_s_a_1_4?crid=3HOPWZMYP2EEF&keywords=cards&qid=1681161453&sprefix=cards%2Caps%2C139&sr=8-4

That's a little over 600 cards there.

As for art, it's not the most richly visual game ever. 7 base cards and 26 kingdom cards is 33 unique works of art, plus the design for the box and manual, in addition to not being a particularly large number of assets or particularly difficult ones to produce, they are also one time costs for the life of the product till a redesign.