I used to shop at dollar stores rather often, Dollar Tree is where I got the headset for my cellular phone actually, and it's still kicking 2 years later without a problem.
I love those mini fans amd e;electrical engravers for musical projects, let's just say I have some inventions using the basic motor mechanisms of those devices that I should patent.
Usually I buy scouring pads, office supplies (but NOT stape removers and highly mechanical stuff). If it runs off of mains power I pretty much avoid it, however, candy and drinks are a common grab for me too.
However, I must be very out of touch, I don't ever recall seeing condoms at a dollar store before, and even if I did, I def' wouldn't trust em'.