Finders Fee Contract for a Potential Real Estate Sale

[Rhonda E.]

I'm in NYC.  A friend told me he's working with a venture capitalist looking to sell several properties ($5M asking.)  My friend (not in RE) is getting a flat fee for finding the VC a buyer (and has a contract with the VC).  I potentially know a buyer.  I am not in RE.  I want to have an agreement with the potential buyer that if a sale happens, I, too can collect a fee from him/her.

I understand this is not strictly wholesaling because I do not have the properties under contract, but if both parties have full disclosure of fees, this is considered proper, correct? I've left voicemails with a couple of attorneys am awaiting a callback.  Thought I'd ask the question here in the meantime.