How much would an iPhone 5s cost without an upgrade available?

Last year around this time I got my iPhone 4s and then a couple months later the 5 came out and then the 5s and 5c and I really need to upgrade. But last year when I got this phone it was my upgrade and I have to wait another year to get it upgraded again. (And by that time there'll already probably be an iPhone 6 I'm pretty sure) but how much does getting a new phone cost without an upgrade available? I see buying one with no contract is $600+ so would I have to pay that? The max I'll pay is probably $100 because my screen is so cracked you can see the microchips or whatever that is and it's so ghetto looking and it'll cost $100 to get it repaired but if I can get a new and better phone for the same price I'd do that instead.

Btw I have sprint

Iphone 5s with no contract starts at 650 for 16gb, 750 for 32gb, and 850 for 64gb. You can upgrade your phone once every two years on a standard contract, so assuming you bought the iphone5s on contract you will only be able to upgrade when the iphone 6s comes out to get special pricing(200,300,400).

Please don't buy anything Apple!