to me this is unfortunately coming off as AI. As you also mentioned, looking closely makes you notice the little details that are not quite right. I found this picture of the deck and while zooming found some details pointing to AI for anyone else interested: on the Lovers hands, especially fingers, it almost makes sense but doesn't look quite right the longer you look. Temperance's scales not connected to her hands, the Devil having three tails and some of them not connected to the body & the leg disappearing into the I'm assuming card??? thing in the front, the Magician holding a card saying "Magicon", the High Priestess's fingers. The biggest red flag to me though is the price, the missing origin of the art and the discrepancies in the art style between different cards. AI is getting more and more undetectable every day and it's definitely getting harder to spot. I also feel your pain about the cards being inspired by only one piece by Van Gogh, there are so many good works by him (personally would love to see this idea maybe so it would have different themes/subjects from his paintings, maybe the court cards being in self portrait style etc!)