I've regretted buying expensive paintbrushes and whatnot that I couldn't afford. Nothing too terrible though.
mispriced many items b 4 and got scammed multiple times a moehog skull went through auctions yesterday for 200k so thats a huge mistake for the owner too bad i wasnt on at the time
quite good at these but this is my worst (not nessecerily in NP lost though just the worst) last chrstmas i traded all of the neopoint i had in pure(580k) for a baby paint brush PLUSHIE thinking it was the real thing and the thing is they didn't try to scam me and it turns out the user was under 13 so i couldn't neomail them!