How A Convention Can Turn Bad...?

Well, I don't really get the opportunity to go to many because I'm a poor fool, but it can be ruined for me if the vendors are charging outrageous prices for things.

It can also be ruined without me even being there, as in one time when I gave a friend money to pick me up some sodas and other snacky gubbins only to find out from them that all the vendors had sold out of their sodas. An unhappy day was had.