@Tamerlane He's either just flexing, or it's what he would've charged for his services, since those talismas are basically just paper and ink (plus glue maybe). Unless they're reaaaally expensive paper, ink, or glue that is!
Man, they were just haunting along down the street, minding their own business, when - WHAM! they're exorcised! Boy, life...err, death...umm, afterlife? - whatever, is rough!
@radstylix More likely he bought them from a real exorcist. We already know his powers are real (just weak) but he spends most of his time being a fraud. So presumably despite his day job he knows the circle of real paranormals and can access their "market". It's a case of an amateur playing at being a professional by buying up pro tools.
These character interactions are just so fun to watch I can't help but smile while reading this. Though I do wonder what an "evil" Rinko-san will be like. Will she actually be terrifying or will she just be incompetent at it?