What have you thrown away before you thought of scrapping, or before you knew what to separate?

Some sort of aluminum dolly or something with 2 wheels and a handle
Bikes and parts
Spare truck wheel: rim and tire
Computers and dryers I scrapped as shred



Things that are too big to fit in a car are acceptable losses, but the smaller items and probably some other stuff I don't remember now add up to some significant $. I started scrapping when I didn't have time for research, but afterwards I still made some lazy or impatient mistakes that cost me.