Well, first of all, the gas lines were because of enforced price controls enacted by liberal politicians. This was a feeble attempt at controlling a commodity and the end result was a disaster!
What most people do not understand is going market price means just that. Just because you have a full tank in the ground you purchased for sale at $2.50 a gallon doesn't mean you can continue to sell it at that, unless your a fool, because as a retailer, you will have to refill your supply at $3.00 when this current supply runs out!
If you do not raise your prices immediately, your going in the hole and losing money on the fuel which is why most fuel stations these days have a convenience market attached to it. This is the only way these stations can survive, by impulse sales!
Most staions now don't even bother to mark up their fuel anymore because of the rapid market fluctuations. It's a lot easier to add a McDonalds or other things to your convenience store to make a profit on because these items reflect a more stable environment.