I have many offers out to lunch and try my best to just put them aside but the biggest problem I have with people is after finally coming to a deal, I receive my cards damaged. Then comes the bullsh!t lies. "Sorry man, I didn't notice it when sending", "must be the post office", "still waiting on your package", etc.....
Just to many of these happening now a day.

This drives me nuts, if there's a crease through the entire card ok sure, it probably happened in transit, but the majority of the time it's a badly dinged corner or something that the other trader was trying to slip past me.