Quoted from Pinplayer1967:
Not as bad as buying statements such as “Cash in hand” please stop! it’s insulting to a seller as if they are desperate and broke. I never return messages to these type of amateurs when I sell something.
I'm going to respectfully disagree with this one as I've used it. Not intending your interpretation though. For me it means, I have the cash ready, quick and easy sale. I don't have to quickly sell a game, use half Paypal, Venmo, whatever. Borrow a few bucks that will only take a day, trade you a garbage game that nobody wants to make up the difference, or any of the hundreds of excuses I've heard why they don't have all of the cash.
I agree with others, my most hated is probably home use only, since xx date.