Don't throw it away. . .

. . . it will come in useful sometime!

In 1972 we installed a milking parlour.
In 2002 we replaced it with a new one.
Several unwanted bits of metal from the old one - pipes and rails etc were stored (ie more or less abandoned to the elements).
April 2013. We need some specialist brackets to fasten some rails together.
They were still fixed to the original pipes (40+ years) and unscrewed with relative ease.
At last, the old brackets have their day "and come in useful".

Thrift at work!