assignment question???

[Mikey Cas]

After reading through a lot of posts and asking questions I have a much better understanding of the wholesale process. I just am curious about the assignment process. What benefit or why would someone selling a house want me as a wholesaler to form a contract JUST for the purpose of having a buyer take it over. I understand the benefit I will receive, and the rehabber who gets the property, but why would the seller want to cooperate?? They want to sell the house as fast as possible so why would they want a newbie trying to wholesale their property? Thanks for any insight