CashIUsed is a great way to go! They explain everything very clearly so that you can get an estimated quote and ship your all in one device to them. Will definitely use them again.
They provided shipping so I never had to worry about one. It's really cool. I got $10 less, but that was because I didn't have the AC adapter.
So i sent my laptop to CashItUsed to sell. And they give me a price before I sent it off to them and they emailed me a postal slip to my email address I sent it off which was free UPS label. I got paid few days after they received my laptop.