to a "normal" state by using iTunes.
Having never seen one, I cannot tell you what to look for, although I am sure you will get some pointers shortly.
Looking at the classifieds for an iPhone 3, I noticed that some were listed as "jail-broken" phones. I understand what this is, and do not want a jail-broken phone, at least until I get to know it better, and have a better basis for deciding.
My question is;
Is there an easy way to tell if an iPhone 3 is jail broken (while inspecting it for purchase), and is it possible to easily "un-break" an iPhone 3?