The Sony Cyber-shot DSC-S730 was a budget compact for the 2008 season, part of Sony's low-end AA-powered S line that sat beneath the mainstream W series. It updated the DSC-S650/S700 pairing with a slightly larger screen while keeping the same sensor and lens.
Specification is a 7.2-megapixel 1/2.5-inch CCD (3072x2304) behind a 3x zoom covering 35-105mm equivalent at f/2.8-4.8, with a 2.4-inch 112k-dot LCD on the back. Images go to Memory Stick Duo cards and power comes from two AA cells, so there is no proprietary charger to lose.
It is an unashamedly simple snapshot camera: automatic exposure with scene modes, modest burst speed and a low-resolution screen. That simplicity, plus AA power, keeps it usable today for beginners or as a cheap CCD-look camera to throw in a bag without worrying about it.
The usual AA-compact checks apply: look for electrolyte corrosion in the battery bay and verify the door latch still holds tension. It takes Memory Stick Duo rather than SD, so confirm a card is included or budget for one. Test the flash and review a few frames for CCD streaking before buying.