There is no bike shop standard that applies to every bike shop. They are mostly sold for what the owner thinks they should sell for. In some cases there are minimum prices the distributor will let the retail shop sell them for. The wholesale cost from one location to another can vary a lot too. The amount of bikes ordered at one time, shipping cost, and a few other things, will affect the price. If you want a good deal, ask for a lower price on accessories, or to include something, they have a higher margin.