What kind of answer are craigslist buyers looking for when they ask “Is the desk available?” Not just fraudspam- these are real people who seem to be expecting a certain reply, and I’m running out of guesses. Yes? Yes + Location? Yes + repeating contact information? No?

Economy of words.

'Is the desk available, because I don’t want it.' I mean, really, who does that? Why not, 'What’s a good time for me to not pick it up?', or 'How much won’t I be paying to not take it?'.