If i sell my iPhone 4S will i have enough money to buy and iPhone 5?

I'm getting an iPhone 4S but i don't know that if i sell it if i will have enough money to buy the iPhone 5 or 5C

You will need about 100 Pounds or Dollars (I Live in the UK So I say Pounds) More

Sorry, don't think you will have enough cash. The 4s can be bought for around £250 now. You'll not get a 5 or 5c for that.

A used iphone 4s is currently selling on sites like gumtree and preloved for around the £200 mark if it is the 16gb model, a used iphone 5 is selling on that same site for about £350 in good condition so no you wouldn't have enough, gumtree is about as cheap as it gets, you would need to find another £150.

If you buy on contract where the cost is lower then probably, otherwise no. You can also trade in 4S at the Apple store now and they will give you credit for it.