and remove my name from this property since the owners have paid me the redemption fee I asked for.

Inspections, title, and closing fees could be $2,500+. 

The only reference I have is for my duplex and triplex properties in CO; sewage, water, garbage and share common area fees paid by me; tenant pays gas and electric.

don't ever discuss reas their application fee rather than falling for the threat

The annual filing fee is $50.

Oftentimes in Sheriff's sales the final judgement amount is published whereby you can see how much the bank is owed, including outstanding balance, interest, late fees, legal costs, corporate advances for insurance, taxes, etc. 

Are the fees negotiable?

Someone who is familar with NY State, fees etc and can do a realistic analysis to see if it currently makes sense to do it given what I have (Vs. someone less experianced who just wants to sign the business)thanks

That could be an advantage in that no lawyer will take that type of case on a contingency fee if they don't think they can win.

You can usually find info on the utility fees charged by the comps on Apartments.com or on the apartments website.