Yup, notice in my post above how I mentioned to expect paying 6% in buyer concessions...While I have definitely seen buyers who ask for less (in some cases as little as $1-2K), the majority of buyers these days are asking for at least 4%, and it's not at all uncommon to see them asking for 6%.So, like you already figured out, assume worst-case (6%) and if it's less than that, consider it a bonus!

Now, serious damage or a lengthy eviction are uncommon.

It's a very nice place, and it's not uncommon to run into famous people there.

I would not say it is uncommon, but I also would not say it happens all the time.

This is not uncommon. 

It is not at all uncommon to have student applicants whose only income is their student loan or research grant.  

It's not uncommon for professional operators to be in the 35-40% range.

We only charge $30 for the background/credit check through zillow, but it's not uncommon for other places to charge $75-100 per person.   

When the initial agreement is signed, the buyer will post a deposit in the amount of at least 10% of the total purchase price though it is not uncommon for the deposit to be much higher.

It's not uncommon for a properly sized AC to run nonstop on the hottest days of the year, but I would still expect it to get cooler than 78 degrees.