@PokeDadInTraining asks
seller says this weird ink spot is a super rare error. How do you know if that's real?
Jeff answers
I'd want evidence that it's a production error and that collectors recognize that type of error. Damage can also look unusual. Start with the ordinary card reference in our app, then seek specialist comparisons for any premium. The seller calling it rare doesn't establish either point.
— Jeff, infinitepulls.com