Whenever I have purchased something like that from GW, it was NEVER with the intention of using it "as is."NO NO NO, do not buy it USED. You do not know what you are bringing into your garden. A dehumidifier sucks in air full of moisture. Most likely a used one has had MOLD SPORES pulled through it and that is not what you want to introduce to the garden. Even if you clean the outside its the internal parts to worry about. I would not suggest getting one used just to save a couple bucks, especially from Good Will.