So far never had a problem with bedbugs. Like movieman I have had roaches as well as evidence of rats in the unit.
I dont have a warehouse to store my stuff in, most of my stuff gets stored in my house. As a rule of thumb, just in case, I deliver everything from the lkr to the outside of my house, I rummage through everything and toss what is trash, and inventory all the good stuff outside my house. Good stuff gets put up in my house, but junk never goes in. Keeps alot of things safe from going inside my house. It is not full proof, but then again what is?
Mattresses are an automatic trash to me, unless the plastic cover is around them, never found a person who wants to buy a used mattress, although I have had a few that people will take from me for free. But even then I had alot of people turn down a free mattress. So for the most part those sit outside till I make arrangements for them to be dumped.