That's the only problem with a clamshell phone - there's always that weak spot around the hinge, and it's not covered by your warranty either. Though to be honest, looking at the state of it for the age, they'd take one look and tell you where to go :)
Everyone is knocking Nokia, but they have the most reliable software of all the major brands... they just aren't as sturdy anymore. I was using an old Nokia 3210 for about 4, 5 years before finally deciding to go for a colour screen. I wouldn't rate Samsung much at all for software reliability. LG are getting better... Motorola and Sony Ericsson both pretty good.