NOKIA C2 - 02 IS a little brother of nokia C2-03 and C2-06
NOKIA C2 - 02: is a stylish simple phone with touch & type interface, 2 megapixel camera, a speakerphone up to 80 dB (what is quitle good for mono loudspeaker) a 2.6'' TFT resistive touchscreen make this phone a quite good and simple touch&type phone with symbian 40 operating system... it will only cost 80 euros
nokia c2-03: is a bigger brother of nokia c2-02... it has 2sim card slots (2 operators are activated in same time)
that's the only feature that nokia c2 03 makes other.
nokia c2-06: is just same phone as c2-03, but a updated, faster version of nokia c2-03. but actually it isn't a change, because you can update nokia c2-03 manually to newer version :D
nokia c3-03 and nokia c2 - 06 normally will cost 85 euros, so 5 euros more than nokia c2-02, but 'cause they come little bit later out, they the price will low down to 80 euro :)

SO NO PRICE DIFFERENCES!