Your advice: Is it time to sell my iPhone 4S 64GB (in readiness for the 'new' iPhone?)

Is it time for me to sell my iPhone 4S 16GB now before the iPhone furore starts whilst it’s still got it’s value? Obviously iPhones still retain a good second-hand resale value, but that’s going to degrade with arrival of the 5, right?

I popped on to Envirofone today to see how much they’d give me for the current model. The answer? £325. Not too shabby.

I’ve probably got about £1,000 back from Envirofone by sending them a load of phones (and iPads) that I just don’t need. They’re terrifically reliable and quick at paying too.

Since Three are so bloody awful at managing what I actually want, I need to do the whole equipment upgrade nonsense myself. I shouldn’t have to. I should be able to tell them to get me the new iPhone when it arrives. But no. I have do manage all the stupid logistics.

So is now the right time, do you think?

Or do you reckon I should wait until the ‘new’ iPhone has actually arrived? I wonder how much this will knock down the resale value? £50 or £100 perhaps? What’s your view?