Now that more and more countries are getting into space exploration, I wonder how long it will be before commercial companies start developing and selling space probe platforms (just like launch platforms now).
Photon mentioned in a sibling comment builds on that idea by providing a bus with engines to make it into a simple spacecraft. I don't know of any off-the-shelf rover platforms yet but can absolutely see the same thing happening when there's enough demand / cost of access to places worth roving around is cheaper.