"You know the stories..... last month vendor tells you next month...I will bring chips. This month....no chips? "
Or they just sold them.
I have one guy at a Flea Market that's only open May to Oct. keep telling me about his collection he wants to sell and will bring it with him next time. I can't always get there and when I do of course he don't have them and I tell him when I'll be back and repeat.