Also understand that if you are looking at Icon, each jacket has a different fitment chart. A large in a Motorhead is not the same as a large in a Strongarm.
As for online pricing, I sell in my store for about the same as I do online, maybe a little less because I don't have to worry about shipping. Understand that any online dealer who sells Icon or Joe Rocket is required to have a brick and mortar store with dedicated retail space for the product they sell online. If they can offer good prices online, they can offer them in store as well.
As for special orders: Any PU dealer can order almost any product and have it there next day. Most online houses are doing exactly that.