Try and pick a cheaper model, anything without a camera in it will already be not that expensive, like i said i will be going for a older type samsung, 1 of those that you can open up and has a display on top with a little clock (i don't like wearing a watch)
It will probably one with 1 of those old colour screens, they should cost that much, i believe my brother saw one i liked for like 120 euro, but that's sim lock free, if you get one with a provider then it will be much cheaper.
I know what i will use, it will be telfort, there is a internet package here which costs like 5 euro a month, and you can call like 5-6 hours a month, i'm not sure, but my father and my brother have been using it for a year now, works great.