I'm finding the MC a little stupid. It's just like the grandpa said you should've just bought the freaking book cheap and scammed them why are you making money in pennies when you can make it in dollars?
That girl is so damn annoying as well, she basically considering everything that hes going to buy as something good and will buy it from under him. Hes freaking losing money, and because she wants to make money she's trying to poach him into her auction house without so much as a sacrifice. I fucking hate that girl better have her piss off.