I'm pretty sure I'd make a pretty bang-up pet psychic. I'm good with reading the body language of most legal house pets, and telling people what they want to hear. I think I could offer genuinely good advice enough times that I could justify what I'm doing and how much I'm charging for it.
The real money's not in that shit. It's in the low hundreds of dollars (or less). Sell an $85 sexual potency spell. A $110 "bring back my ex". And (if your practice the darker side of the Art) a "Curse my enemies/make them suffer/get revenge NOW" spell for a clean $200.
Oh yeah, I was just picking out the outrageously high dollar stuff; there's thousands of listings, most of them in the hundreds or less, these are just the "only need to sell it once" type