How much is an iPhone 3GS worth?

I have a 16GB black iPhone 3GS. It's in quite good condition and it's unlocked to all networks. I'm getting a new phone soon and I want to sell my 3GS. How much are they worth?

It's a very old phone and there's a lot of people trying to sell it, so you won't be getting very much from it. Judging by eBay Buy It Now prices, there are a lot of unsold ones in the same condition as yours for $130, so realistically speaking, if you auction it off, you can probably get $100 for it. Probably a little less han that. Then you have to factor in eBay and Paypal fees. That usually totals up to 13%.So you will only get $80 to $85 for it, if not less.

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