reasons i hold onto this stuff:
Batteries -- I refuse to believe that a lithium battery can "die" after less than 100 cycles, and the ones that look dead have mostly been dropped. One day I'll look up how to disassemble a battery and see if I can't re-attach the sensor or something.
Atomizers -- One day I'll get some PGA and wash them all and they'll be like new again!
prefilled cartridges -- I know I'll be refilling them, right now I'm still buying stuff looking for the perfect e-cig solution, but eventauul I'll stop buying and continue refilling.
prefilled cartomizers -- I find they last about five refills and then I toss them; but those waiting for number five, I keep.
boxes and packing slips -- those I toss.
juice -- there's no juice I won't use; even if I don't like it straight, it'll be good to mix with something else. And you can never quite get the last few drops out, so there they are.
Until they get it so you just reach into a pack and grab an e-cig and suck on it, I have a feeling most of us are keeping a whole lot of stuff.