When a local store was struck by lightning and suffered a smoky but small fire, there was a mannequin who looked like an actual human burn victim because a layer of it's "skin" peeled off or something, and it smelled very bad. I looked at it in the dumpster and decided against taking it. Then a few nights later two of our patrons from Chicago found "her" and loaded it into their truck for a long ride home.
We were chuckling thinking :"What if they were stopped by the Police and they checked their trunk? It took more than just a glance or two to realize it was not a human corpse.
IF dumpster-diving remember that items with real animal fur on them will always have "Bugs", unless they have been recently quick-frozen to eliminate those bugs.
I Passed" on a 100 year old taxidermied deer head for this reason. It's "eyes" were crossed and it had Frankenstein-like stitches showing too!