I don't think that the large commissions is a problem that something can be fix by your idea. First off all the commissions handed down by the ecommerce platform is not always fixed most of the ti.e before even a reseller sales its items to the platform they will always enter into a negotiation first. So I really do think having an Amazon version 2.0 for you won't change anything. Another thing is you need to have loads of cash to even steal a market share and resellers from e-commerce giants. You need to have a better idea than this one.