The next time you see a sign like this...

Hopefully he was a douche because he bought a lot of really cool stuff they didn't need.

...make sure to stop, because you never know what terrible things you can find out about your neighbors just by digging through their trash sellable items. Below are 16 things that humans never should put in yard sales, but totally did.

1. This totally legal and non-dangerous medical treasure chest.

This is a great find for any junkie who trusts everything is correctly labeled.

2. This phone that may or may not contain boobs.

Life is like a phone at a yard sale: you never know what you're gonna get.

3. These accurately described boxes.

What do we want? Boxes with numerous holes drilled in 'em! When do we want them? Probably never!