This is very common for out of area owners. 

I made an urgent request to obtain a duplicate key to the common area (note that this key is required to be able to enter my condo unit), and the property manager has not delivered the keys 7 days later, in spite of letting him know this is urgent.

To make a long story short, he made a classic error and commingled funds a few years prior and opened him up to liability.

Certain things can happen which revive the redemption period but not all that common in residential transactions.  

@Ashley WolfeI probably wouldn't use an agent for the off market properties unless they are sharp with common sense and can negotiate.  

Sometimes the due diligence information provided is worthless because it is two years old by the time I get it or it is so full of errors that you cannot trust anything that is included. 

While talking to my good friend and triathlon coach David Scholl we came to realize that we share a common interest in real estate.

In contrast, large rips or indelible stains justify a deduction from the tenant's security deposit for repairing the carpet or drapes, or replacing them if that is reasonably necessary.One common method of calculating the deduction for replacement prorates the total cost of replacement so that the tenant pays only for the remaining useful life of the item that the tenant has damaged or destroyed.

And your results are common unfortunately.And of course the nice guys who sell them to you will buy them back at 50 cents on the dollar that's common or worse.If you cannot personally manage them and get them running then you need to cut and run is my advice..

A few more but I feel these atributes are not common in the REI businesses described here or by REIAs or gurus.