Refund + commission for ordering overpriced books ?

Hello, I ‘ve been contacted by someone saying that they will give me a full refund + commission for ordering a specific book (children coloring book that’s overpriced, like 75$ instead of 10$)

Here is the book in question : https://www.amazon.ca/dp/B0BTRXK6BV

What do you think ? what’s the catch ?