I am looking to buy, rehab and sale deeply discounted distressed single family property in the suburbs of Detroit.

Or the person who tries to negotiate a bulk rate discount, cops an attitude, and fusses about my attitude, and threatens to rat me out to my broker or the ethics board if they don't get their way?

Also you can always inquire about the other buildings and they may be willing to give you a discount on a multi-purchase situation.

You find a property at an extreme discount and you find a buyer who is ready, willing, and able to buy that property at a slightly less of a discount that you bought it at.

They would pay 500-600 a month and possibly manage the property for a rent discount.

Which basically means if you are looking for a discounted off market property, then some of your discount you were hoping to obtain just went to the agent.

Also, the market impact is tremendous. 

It's up to the Seller to prove otherwise.Additionally, low/no down payments are normally used for distressed properties that are discounted below market value.  

Some "wholesalers" actually tie up properties on the MLS trying to "wholesale" them when there is no legitimate discount off of FMV.

You are either trying to buy equity or cash flow at a discount.