Volume discounts - These guys are doing it wrong

It's just volume discounts wich all retails do in one form or another. These web sites are signing up members which limits what retails will do business with them. The better way is to make a market place where the retailer and it's item the main focus, Not much programming for feasibility, couple of screens, backend interface to hold addresses, basic item tracking logic, and a ASCII file dump to send to retailer. The catch would be a hook into the likes of Facebook in app mode to drum up the volume (I would want 3 volume/price levels - not just one).