The Nikon Coolpix 3100 is a compact digital camera with a 3.2-megapixel sensor, introduced in the early 2000s as an entry-level point-and-shoot in Nikon's Coolpix line. It was positioned for casual users who wanted a small, fixed-lens digital camera with automatic exposure.

Sales data for the Coolpix 3100 at UK auction is extremely thin, with only a single recorded hammer result of £550 from 2006 — a figure that reflects the early digital market rather than today's value. In 2026 the Coolpix 3100 trades as a low-value second-hand digital compact, and the lone historical sale should not be read as a reliable indicator of what one sells for now at saleroom level.