Or it will be like commercial where the first thing a buyer's agent asks the listing agent is "Are you offering a co-op commish?"

So, looking to purchase a co-op and the co-op is offering a credit towards replacing the floors. 

remember, agents go be bother listing and buyers agents here That's how it normally works, but the OP said "They are also not allowed to see other properties unless it is the same real estate agent listings." which seems very odd.

Doesn't matter if the municipality for property taxes or utilities (usually water or perhaps sewer), lender for a mortgage, or even a condo association for HOA dues...As for the OP, I'm not sure I understand all of this since I don't do it. 

That is why I mentioned to the OP that his transaction could be facilitated through a merger/structuring :)

That's why I wanted to share our analysis and explain why I disagreed with some arguments made by the OP. (3)My husband did an analysis for a friend who had high W2 income but didn’t own an STR yet.

Different tax ramifications stem from each treatment.Not enough info in your OP to make that determination.  

(My company closed, so actually they pulled the trigger.)The OP is making more than triple what my wife and I made.

You should put in your listing what you will pay the buyer's realtor for a co-op. 

Co-op broker fees have been diminishing over the last few years, and I think it will accelerate.