I've been following one on ebay to see what it would sell for.
Found Here
Xbox Edition in seemingly like new condition with all orignial packaging sold for 483 USD. Only US shipping as well
I'd love to get one as I love Fallout but that's far too rich for my blood.
The last one before this that I saw sell on ebay went for around 350 but wasn't as good conditon.
Basically, themidlandmaster seems spot on.