Amazon? Craigslist? And how much should I expect to pay for a new iPhone 3Gs that is unopened and in a box? How about for a used one with no significant or obvious blemishes or faults?
Canada apple website sells new 3GS unlocked, tomgive you idea for a new one. Expect poor battery for a used one, as the life time is usually 1-2 years. Factoring in the cost of battery replacement, i'd go for a new one.