As a real estate broker in Brooklyn with 15 agents, I concede that I am of course biased in this regard, but I always think it's a great idea to get your New York real estate salesperson license.

OK I'll concede that it isn't a bad suggestion. 

He thought being a lawyer and threatening a lawsuit would have me concede to his wishes and that I would believe the BS that he was stating (he is a bully). 

Yes, you can negotiate after inspection on price, and they may, or may not concede based on any number of factors.

I had to introduce her to the concepts, assure her we had the support structure in place, and ultimately concede to hiring a property manager to put her at ease.

Set up a uniform program of what you are willing to concede and do the same process on all.

Then I would make another list of things that are important but you would be willing to concede for the right deal or opportunity. 

I would start with $50 rent reduction and move up from there to what you are comfortable with conceding.

Then be willing to concede on the nice-to-have's.

Back to the original "you'll have to do better than that" if the seller does concede price.