If you're selling a contract and you know that contract can be invalid then your product is flawed, you're selling bad merchandise, you're also entering into fraudulent waters making implications to the buyer of that imperfect contract. 

The electricity had been stolen for the copper (knew that before buying).

I get a couple of these per month and the number gets blocked (it’s never a stored number) because it’s quite often a stolen number if you backsearch them.

I found out today when i was told by my prop manager that the AC unit was stolen and tried to file a claim.

You also don't want the guy that shows up in a beat up (possibly stolen) van and doesn't seem to have his head on right, but gives you a cheap price. 

What do crackheads get for a stolen used water heater? 

We had several evictions, moderate damage (including having the copper pipes stolen when criminals pretending to be tenants came and cased the house), and a lot of anxiety about vacancies.

From sketchy contractors, to having our water heater and furnace stolen not once BUT TWICE.

During my time there, my car was stolen 2 times.

We had an AC and furnace stolen.