most was on a singed artms photocard that they were selling at the tour as merch (€30). but for unsigned/normal pcs the most i have spent was €15 excluding shipping. some were aespa pcs (what i now kinda regret since i don’t stan them anymore) and some were on loona pcs. but nowadays i try to not spend more than €10 on one pc. i also try to buy pcs in bulk to save on shipping and to try to get a bundle discount. honestly i would only consider spending more than €10 on bbc loona era pcs, other than that i don’t find it really worth it anymore
actually ive spent $70 two different times, one was a signed leeseo which was okay but the other one was a leeseo pob 😭 but it was a rarer one so i really wanted it, overpayed like $20-30 on it tho lol