Obviously the closer the 2 numbers the more dangerous the switch. 

35k homes in st. louis are pretty dangerous.

Even if the didn’t it’s dangerous not to do so.

One day someone will have to deal with it and there is a danger it will get so run down that it ruins the whole street.

Here is an article that addresses some of the secondary market activity of the liens:Article Source Link Legacy Second Liens, Once Short of Buyers, Now Lack SellersBYBONNIE SINNOCKAUG 15, 2014 10:44am ETThere was a time years ago when second liens were the toughest legacy home loan asset to find a buyer for in the secondary market.But today, there aren't enough of these second liens being offered to match buyers' appetites — at least from the perspective of a limited group of fund managers who are looking to buy whole loan pools at a discount, said to Jonas Roth, managing director with MountainView Capital Group in Denver.One would think those holding seconds would be happy to hear this, with particular nonperforming seconds in danger of becoming uncollectible under certain state laws.But this motivation doesn't seem to be spurring enough sales to feed existing investor demand, although some deals do trade from time-to-time."

The multi family units in my area are either in a very dangerous part of town or are way too expensive to cover the expenses with the rental income.  

Once I put in that offer, I was so nervous, and felt like I was about to go skydiving or something very dangerous..Fast forward to today.

Us SoCal dudes aren't too familiar with that stuff or any other wet substance that supposedly falls from the sky.

Here's how mine reads (taken from the California Assoc of Realtors residential lease agreement):No smoking of any substance is allowed on the premises.

Yes it is dangerous.