See Capabilities & Services SpaceX now lists "Payload to Mars" as a service it provides. It will launch up to 4,020 kg of payload on a Falcon and land it on Mars., or 54,400 kg on a Falcon Heavy. No price given. This looks like Elon having a bit of fun, but also saying that in all seriousness, SpaceX will be glad to take your Mars mission cargo and put it down gently on the surface, just call us and we'll talk. I love it. No other government entity or private company has ever made such an offer.