Third party batteries are cheap - $30 to $40. My current batteries were purchased more than twelve months and still going strong. I typically get between 1500 to 3000 shots on a full charge depending on my use of AF, photo review times etc. I wouldn't let battery choice affect your decision. If you can live without video, high ISOs, liveview, microfocus adjustment, small/bad LCD etc, For $700, it sounds like a great buy. They are very tough camera that can produce spectacular results. (Although, I'd be a little dubious about the shutter count).