We have a horrible store over here in the UK called Computer Exchange (also found one on Manhatten too...)
Their website listed my iPhone 2G (original iPhone) for £185 unlocked and in mint condition. As you might imagine, for a phone that was 3 years old, it wasn't mint. So for mine they would offer me £143. I sold it to a 'friend' for £150 LOL
Not bad really, 3 year old phone, I paid $400 for (when the exchange rate was £1=$2.10) so I only lost £40ish on it in 3 years.
pac