When a character dies, it's not often that the players consider disposing of the body. Of course in some cases there's nothing to be done, as the ex-PC crumbles to dust under the withering touch of a lich, or is burnt to a crisp by a dragon. But when the body is just left there after expiring, the question might arise.
A standard approach would be to carry the body back to the nearest town for a decent burial, or cremation on a longboat, or whatever the local tradition happens to be.
A more pragmatic approach might involve selling the body to an organlegger or a necromancer.
Transcript
Lando: Look, it's a very risky procedure. Everything went perfectly, except he's dead. It's not meant for freezing people! You can't put Princess in there without a fair trial!
{beat}
Darth Vader: Very well. Prepare the chamber for Starkiller.
Boba Fett: I shall take Solo's body.
Lando: His brain is crystallised. And he's still not a shapeshifter. He's totally useless to you.
Boba Fett: Nonetheless.
Darth Vader: The body is yours. Take it away.
Han: {dead} So, shall I roll up a new character? Or maybe take over Lando?
GM: New character, please. I have plans for Lando.
Han: Cool! I'll start writing some back story. You'll meet me when you get to the Dagger Bar.