It's not uncommon to see a house about to fall down with a family living in it, next to a burned out house, next to an empty lot, next to a brand new house with a Lexus parked in the drive way.

@Gabriel Caron In the states, generally speaking, unless a minor is emancipated or some other uncommon situation applies, property will pass through probate court or trust.

So. it’s not uncommon to request proof of rent depositsvia bank statements and corporate/LLC tax returns.

Not uncommon in commercial deals, each party pays their own. 

I will say though that it is not uncommon for military to leave a duty station well before reporting to another.

As to your returned mail, up to 10% return on postcards is not uncommon.

For example before 2008, it wasn't uncommon to buy a large apartment complex or a fourplex in say....

Not uncommon but here is the part I haven't come across before.

An area where I have a property the homes are mostly built around 1900 and it's not uncommon to have sloping floors on the second level, and most of the homes are structurally sound. 

Look at NYC where its not uncommon to get 2-3% returns on investment properties.