Are these good prices for a used iPhone?

So I have a choice between a 16GB iPhone 4 for £230 or a 16GB 4S for £260.Is the iPhone 4 still a good purchase or am I better off spending the extra 30 quid and getting the next model up? Can anyone with either or both phones give me some pros and cons of them as well?

Just spend the extra money and get a newer model.It'll be worth it.

I would get the 4s coz it is better to say I have a 4s than a 4 and I have a 4s and Siri is rlly good!