Or they may feel they have become more efficient in their usage and justified in bugging me for a rent reduction.

So you can think about it as a reduction in income due to the projected loss of rent.  

I would ask the seller for a price reduction on the sales price or another concession and relieve the seller of the headache.

Paying off one at a time is better in that paying an extra principal reduction on all doesnt help your "cash flow."

Not long, it was seconds after a deal fallout and a final price reduction that I got my offer in.

John- An inspection clause gives you the right to inspect the property within a certain period of time and if you find something that you did not originally know (for example, mold in the attic), then you can either ask for further reduction in price or walk away.

Maybe you split the reduction with your buyer, so he is happier and comes back to you.

Re-renting was next to impossible and I was looking at MAJOR rent reductions to fill the properties.

After considering tax write-offs, appreciation, and debt reduction, the 2nd property nets about $1,000/month, but I don't realize most of that until I sell, which could be years from now.

That kind of reduction can be devastating.