It depends mostly on the cost of the item if I was to resell it, and how big the boxes and packing materials are. I kept the box from my 11 year old dual DVD player, and packed it away in it recently. I hope to sell it for at least the fact it plays HDCDs and decodes regular CDs at the higher bitrate, too. Sounds great with CDs in it. Receiver boxes get kept for upgrades. Or speaker boxes, if they are not too massive. I had to toss my giant sub boxes and my main tower speaker boxes because of the massive factor. And folding them up dont help a lot, because the styrofoam in them was massive, too, and needed a home then. So in the trash it went. Just like my 2 massive LCD boxes. If you ever need to ship that massive stuff, you can get some other giant box and just modify it later for shipping, like a washing machine or fridge box or something.