Is it a good idea to leave parts laying around?

kluchgts

Distinguished
Apr 25, 2013
186
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18,695
I'm asking because I want to buy parts on black friday/cyber monday to save money, but I wanna put together the computer later on because I have a friend that wants to buy my current computer, but a few months after bf/cm. Saving the parts to use later would let me use the most of my current computer and extend the lifetime of my new one.