Suppliers for lots of things charge whatever people will pay regardless of current market conditions. From time to time I read about lobster surpluses, where prices for distributors plummet and they just can't get rid of them. But when I go to the supermarket the price hasn't budged even $1. The supermarket knows the average consumer isn't aware of the fluctuations in the wholesale lobster market and even if they are, who's going to change supermarkets just to save a few bucks on one item.
