Which is the cheapest mobile phone available with an inbulit GSM modem for internet connectivity through GPRS?

lookin to buy a cheap mobile phone, which can be used to connect to internet using data-cable. Preferbly a Nokia or Sony.|||The question has been raised just when it is the real research i have been carrying out. So far the observations show that to use the Nokia PC suite and a Nokia phone as a Modem, the phone it self should be having blue tooth and and at least some memory and thus one with a memory card is better. This makes it the cheapest Nokia phone having both the above requirements.