All up to who opens vendor housing and where & what their selling. I think the exchange would still have its purpose. If i choose to sell Mk-1s from my house by wongs cartel up ne somewhere and at the exchanges as well. It could still benefit people closer to the house selling the Mk-1s as an example. Would make for interesting RP for those who end up finding out the guys house their buying from is someone they dont like also lol!