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No. A Canon SD850 camera takes an SD chip, which is not compatible with any of Sony's memory sticks.
Current Canon digital cameras with those specifications are the A580 (being offered new for $129-$219); the A590 (being offered new for $148-$299); the SD850 (being offered new for $222-$379). All of those models come complete with battery -- and charger for the SD850's Lithium-Ion -- cables, strap, software, and instruction manuals. There is no reason to pay anything near the high-end prices. If you want a case, that will add to the cost.
Lots of camera enthusiasts in forums online will agree that the Canon SD850/950 IS is the best camera to use in a low-ISO environment.