Seriously - consider the use of a pay phone, or a hotel phone. It is often
hard for me, and many other customers, to get completely accurate
information on phone call prices. When it comes to phone calls, I've
always missed some charge or tax, or there is change from when I last got
the info. 

So: (a) how many other economic transactions have this feature, that it is
hard to get an accurate price? (b) If there are many such examples, should
we think about "fuzzy" prices or "prices-as-sets", or "expected
prices"? A lot of basic micro assumes there is a single number "p". Maybe
we should think of price distributions instead. 


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