When I found out the property had a shed, as well as an extension built off it, I was excited... Until I saw the inside. The shed was full of scrap metal and junk that was knee deep and smelled like rat urine.
It took me a number of months to separate the scrap metal, to get a few $$$ for my troubles, from the rest of the junk and get rid of everything. I'd usually spend like an hour before sundown, on the evenings before trash day, and just shovel loads of junk into the bin before wheeling it to the curb.
When I finally got it all cleaned and swept out, all the smells were gone, I was thankful for that. Some of the stuff, I kept, figured I could likely reuse it, and was finally able to get all my lawn equipment out of the garage.
The extension off the shed was the same way. It looked like it might have been a nice screened in patio, overlooking the water out back, but had turned into junk overflow. The thing I didn't notice was that a ton of shingles had come off, and the seal around that skylight was bad, so the plywood decking was starting to rot. I didn't know squat about roofing back then, or I could have saved it, but it wasn't until the roof was falling apart, and gaping holes formed that I realized how bad it was. Had to strip the rest of the roof, just so the joists wouldn't get damaged further. Rebuilding the roof is lower on the priority list since I'm too tall to do much in there fully standing up.