What's a good/reasonable price for an iphone 4?

I'm going to get an iphone 4 thats 32gb, is $250 a reasonable price?
(unlocking it for t-mobile as well, price of unlocking not included yet)

Added (1). Not interesting in buying iphone 5, i want the iphone 4 lol
(it's used but nearly new condition)

$150-$200
if it was a 4s it would be $250