Charizard black triangle pack

Quick question, is £85 a fair price to buy a charizard black triangle pack or is it over priced ?

Duno if I wanna waste the money or not on it

Regular base set boosters are averaging £30-40, it depends on how much you value the Error triangle if you think it’s worth an extra £50 it’s upto you, there is not one loose on sold listings(eBay), therefore not sure the fair price, personally I wouldn’t pay more than 50% on top of the regular base set booster price,

Good luck