depends what you are looking for. sensor size? zoom? fast lens?
You can find a used P&S with 26-130mm/2.8 lens for $100. yep, f2.8 throughout the zoom range. small sensor though 1/2.3" . (Olympus XZ-10)
Nikon Coolpix A is great buy you'd be hard pressed to find one for SGD300. Maybe USD300? large APS-C sensor, but fixed focal length.
alternatively, a used Sony RX100 MK1, saw one on B&S recently going for $280.