The Olympus Tough TG-320 is the entry-level model of the 2012 Tough line-up, announced in January 2012 and on sale from February at around £130. It brought the rugged formula down to genuine pocket-money pricing in cheerful red and blue finishes.
Protection is scaled back but real: waterproof to 3 metres, shockproof from 1.5 metres, freezeproof to -10C and dustproof, around a 14MP CCD sensor, an internal 3.6x zoom covering 28-102mm equivalent, sensor-shift stabilisation, a 2.7-inch screen and 720p HD video usable underwater. It is a point-and-shoot in the purest sense, with minimal manual control.
As the budget gateway to the Tough badge, the TG-320 sold widely as a child's first camera and a cautious swimmer's poolside companion, and that is exactly the niche it fills used - it is one of the cheapest genuinely waterproof cameras you can buy in the UK.
Given many were owned by children, assume a hard life and check accordingly: examine the seal gaskets on the battery/card door for damage, look for sand trapped in the door channels and under buttons, and reject anything with corrosion inside the compartment or condensation marks behind the lens window. Verify the zoom rocker and shutter respond crisply, run a short video clip to test the microphone (a common flood casualty), and factor in that at 3-metre depth ratings there is little margin - replace or at least silicone-grease the O-ring before its first swim in your care.