First of All we need to consider that the cheaper camera will might have some shortcoming and lesser options than the other expesive branded camera.
The Cheapest Digital camera brand are Hewlett-Packard, Vivitar, VuPoint, Pentax, Polaroid, Fuji Digital & Kodak
Most reliable cheapest Camera Brand:
Among all the above mentioned digital cameras brand the most reliable digital camera brand is “Kodak” its digital cameras are easily available between $70 – $90 for more than 7 and 8 megapixel that is very reasonable and Kodak brand is very reliable enough for you to chose.
The best Cheapest Digital cameras:
Best Digital camera of today under dollar hundred is Kodak Easyshare C813
Best cheapest Digital camera is Kodak EeasyShare C813
Kodak EasyShare C813 Important features
+ 8 Megapixel camera (Excellent)
+ 3x optical zoom (Good)
+ 2.4 in. color LCD display (Very Good)
+ Digital image stabilization (Excellent)
+ High ISO, up to 1250 (Good)
+ HD still capture (Very Good)
+ Video with sound and print options (Very Good)