The sellers have been dragged along to long and are unwilling to do another extension forcing this buyer to be exposed to maybe $500k in tax liability. 

Quite honestly, if a property manager is unwilling to give me a little bit of their time to answer questions then they aren't someone I want to work with anyway. 

Assuming the lease says he can use the parking space(s) and the iif the seller is unwilling to deal with the third floor tenant (and unless you have addressed this in the P&S she may not be interesteding in doing anything at this point) then you will have to once you own the property.

Often times they just owe too much and are unwilling to let it go for a loss.  

@Meghan McCallum More than once I've had buyers walk after a bad inspection (during the contingency) w/ the bank unwilling to budge at all in price, then the next day after they receive the cancellation I get a call inquiring on what my buyers need to get the deal done.

Typically speaking, you will have a difficult time finding "turn key" properties that make a lot of sense from an investment standpoint in this market and will find that the properties with the greatest potential for investment, yes even buy & hold, are those that you can add value to in a way that the typical "retail" buyer can not (or is likely unwilling to).  

If I need 60k to get back in to the market, then I need 60k out of the unit, a price the tenant is usually unwilling to pay. 

I am not eager to deal with the natives in Fredericksburg, but I am not unwilling if there is a good deal to be had.I have more support in Richmond because my family is there.  

Second: sellers with big problems that they cannot or are unwilling to solve.

Usually the properties sit on the market because the owner is unwilling to recognize their property isn't worth what they are asking.