I have a box full of 8700's and 8800's. Some work, some don't. I also have a Verizon 7130 that a 'separated' employee returned - except we didn't buy it for her. It was her own. Works great though!
Don't know what I'll do with all those.
For the Sprint and Nextel devices, I use the Sprint BuyBack
program they have to send old equipment back and we get credits on our corporate account. About $10K last year alone.