I want to do some 3D photography using a pair of point and shoot cameras attached together. I don't plan to make a huge financial investment, so I'm hoping to buy some older cameras, but I'm finding it very hard to get information on what was good 3-5 years ago. I like the Canon Elph form-factor, and the current production SD780's look great (except they're about 4 times what I'm looking to spend). Can anyone offer some suggestions? Obviously 4-5 megapixels are plenty, but I'd like to keep 3x optical zoom. And I don't care about the silly modern toy features like blink detection. Also am I going to have problems with batteries, etc? I want something that was popular enough at the time I can easily find now and that was higher quality in its day (I mean I can get 10 megapixel garbage for under $100 brand new now, that's not what I want). Thanks for any ideas you can offer.