what would a reasonable commission be on a purchase of 23M

[H. Jenna Silver]

I am working with some investors and I have a buyer who is looking at a potential commercial discounted property in the range of 23M

I would like to have something in place with the buyer/investor before I establish the opportunity on this transaction.  If I can get some help in structuring a deal so that the seller (who is a trader getting some amount of control over the asset from the bank, at the moment) doesn't circumvent me in order to be able to offer this distressed property.