Trainer/sports shoe information

Does anyone know where i can find information on the manufacturers that make fashionable trainers- the sort (nike air forces for example) that are sold on ebay directly.

also if i want to buy each item one at a time or say a bunch of different trainers delivered together instead of 500 hundred of the same etc of course i would have to pay a premium but would many of the supplies be willing to do such a thing if so would the premium be too high?

thanks a bunch