A few things to keep in mind before bidding on an iPhone 3G from eBay:

1. You can no longer buy an unactivated iPhone.

2. The biggest iPhone will only run you $299 (half of $600 going rate).

3. Eventually, even your grandma will have an iPhone, and that means you will have paid over $600 to have the same phone as your grandma. Remember the RAZR and the Macarena, people! [eBay]