Nokia 3310.
http://fi.wikipedia.org/wiki/Kuva:Nokia_3310.jpgCurrently, the battery needs to be replaced. Otherwise it works quite nicely.
And I'm still cursing the bad price I got with this phone. When bought in the beginning of 2001, it cost something like 1000 old Marks back then, which would translate to 170 €. And, given that it has been used for 84 months, I have had to pay 2 € / month for using the phone, in addition for the phone bills (which would total 840 € till this day, assuming 10 € / month). So 12 €/month for using a phone. For me, that sounds a lot.
Mika
EDIT: Just noted that the Wiki picture actually shows the phone in its natural state, i.e. out-of-batteries. Nice addition for realism.