I remember many years ago a mate found a copy of Exchange and Mart up the loft at his house that was about 10 years old. We wondered if we could have some fun so decided to phone a few advertisers up to see if items they had for sale were still available. Now, it had to be something they would REMEMBER selling, so we picked on musical instruments....

"Hello...do you have a trombone for sale?"
"No"
"Oh....have you sold it, I am looking at an advert for it here?"
"Er....well I once owned one...but that was years ago"
"Oh, I am looking at the advert now....have I just missed it?"
"Well it must have been ten years ago I sold it"
"Ten years.....well why are you still advertising it?"
"Eh....I am not"
"Well I am holding a copy of Exchange and Mart I have just got (no lies there!) and there is your advert"
"Heck, I had better check that out"
"OK....bye"