No. No, they can't.
I think it's entirely possible that business interests will drive us to pursue asteroid mining before we visit Mars. Musk might change his mind.
It saddens me that they no longer have autographed posters for $100 but not as much as it saddens me that they haven't ever shown up on eBay because $25 is still a little steep for a joke.
'cuz Curiosity cost $2.5 billion. And it's just a VW Beetle with a bunch of science bolted on.