I once purchased a used Canon SD750 from a pawn shop for cheap. The shop included a 30 return. Of course I check the camera out first to make sure it worked since the battery still had enough juice, and I had brought my own SD card with me.
While the article refers to the issue of the cost of a replacement battery on a P&S camera I've bought brand new third-party (Lenmar) brand batteries on Amazon for less than $10 a couple years ago and they still hold a charge.


