There are bound to be some surprises in the early stages..It also sounds a bit like you may be mixing strategies if you are buying and selling alot (the frenetic pace of fix and flips, for instance, versus the slow and steady long term buy and hold rentals). 

One nice surprise (insert sarcasm) was that the previous owner had only replaced the bathroom waste stack in the basement.

I would not be surprised to see the adjustment proceed once it has been reviewed.

They may happen often as a surprise (such as the 2007 and 2008 crash), he suggests, but they don’t come out of the blue: the most extreme risks (and gains) are what he calls “dragon kings” that almost always result from a visible drift toward a critical instability."  

Hey all,Put an offer on a triplex near the airport today and got a nasty surprise when I called to get my pre-qualification letter.  

As a Realtor, my market in Southeast Wisconsin seems to be, to no surprise, strong.

Surprisingly enough there was a podcast guest from Glenwood Springs. 

Company cultures can vary greatly, and you just might be surprised at what you learn while interviewing with others in the area.

I'm a little surprised to see you say its a 30% COC when your just taking the gross rent minus the payments...maybe I missed something so if I did, please forgive me. 

A surprise was the $6000 annual sewer and refuse bill, which seems high for the area.