I've got a nice, simple Nokia 6010 which is just a phone -- no camera, no real bells and whistles. I got it for, I think it was about 80 dollars all together from Cingular. It's one of their Go Phones that uses their Pay as you Go system. Meaning, I pay, say 25 dollars, and can use that to make calls. There's a charge of a dollar a day to activate the phone but that's deducted off the phone's balance and then after that all calls are 10 cents a minute, nationwide (I'm in the US, in case you're not) or free to others on Cingular network.

In my case, I can make a $25 card last about 2-3 months, depending on how many calls I have to make.