Scrap pickup is free, demolition is not.

I see this on craigslist around here, a lot. The problem is, there are people that will do it. Above ground pools, sheds, etc... As you stated. Some people don't value their time. Other people don't realize; inviting people that aren't insured is inviting trouble if they're to get hurt, fall, or slip while on their property. I say, let the ignorant slaves work for ignorant customers.

Gas to drive there is more valuable than my time. I would do it for aluminum siding, if they really want an amateur demolisher working on their house.