Vivitar offers low end 3D cameras
Vivitar introduced recently the ViviCam 790HD (99.99£ in UK) camcorder and the ViviCam T135 still camera (79.99£ in UK).
If you make your very first steps into the world of 3D and are not bothered by quality concerns, this may be a solution. But it may be wise to borrow one for a week before spending any money because both these nicely colored cameras take red/cyan anaglyph pictures and videos only; it is impossible to get separate left+right images pair with them....
Fixed interaxial, fixed lens, digital zoom x4, 12 Mpixels and 720p video (Vivicam T135), 5.1Mpixels, 720p video, and HDMI out (Vivicam 790HD). Both are provided with one pair of red/cyan anaglyph glasses.
In the UK, both cameras are offered by GadgetsQuick among others.