Generally, the owner thinks it was the cleanest home on the planet prior to the tenant wrecking it, so what gives? 

Get thicker skin stop worrying over silly things You need to get over being afraid of a vacancy or the place being left a wreck because it will surely happen and part of investing .

There are people with the equipment and know-how to make a living salvaging wrecked cars.

I would assume a bandit sign is going to work much better in a town with cheaper houses as opposed to more expensive markets like Los Angeles (I see them all over the place in L.A. stapled/tied to telephone poles); someone with a house in my PA market is going to be more likely to call a bandit sign to sell a wreck of a house while pretty much every property owner in Los Angeles is intelligent enough to know their house - no matter the size or condition - is a gold mine and they're not going to call some random number on a sign to sell it. 

The buyers die in a car wreck on I-10.

Apparently the guy lost his job and was in a wreck.

I mean one guy called Morris out with a U tube video of a wreck of a duplex..

The antecedents of the seller show that she wants to wreck the transaction.Shari, you can get it done. 

Put the pedal to the medal and finish the other house or this is going to wreck your credit.

The pictures are like a train wreck, I just can't pull myself away!