Just had the same selling an old Saab 900, listed it no less than 6 times and had a similar message every time, the worst was a message saying he would collect at the end of the week due to work, no worries I thought, he even sent messages through the week confirming collection, at the end of the week he went silent and never collected.

never again, sold it classified within 2 days but made a loss of £50, no probs I just needed it gone.