It's always prudent to *not* be in a hurry, whether a seller or a buyer.
I once had an item listed; the title said shipping included, the text said shipping included.
The first response was a question asking if shipping was included (nothing else).
Now I didn't immediately type the first replier as an idiot, their spelling and grammer were not perfect, but not the same sort of errors you get in 419 scams etc. so I cut them some slack (i.e. wasn't in a hurry) and I replied giving the same answer (nothing else).
The second was from someone who had taken a little more time reading; they committed to buy, supplied a name and address; and got my payment info and I got the money.
The package went out that day.
After the package was sent I got complaint from the first; I told them that they'd only asked a question that had been answered in the ad and the text and my message, someone else had committed to buy etc. (just the facts, nothing about my thinking they were an idiot).
Then I got another message telling me everything I said was a lie, I was and would always be a bad person, etc.
Hope they drive better.