I want to sell both my iphone 4s and iphone 4?

I'm looking to sell both my iphone 4 and 4s without it being an unreasonable price, i just need an opinion on how much and where i should sell it. I was thinking 50$ less than the retail price. And keep in mind that both are in mint condition its as if theyve never been used.

It should be 100$ less

Iphone 4 sell for $150-$200 on craigslist
iphone 4s $200-$250
you won't get much more.
if your in PA id trade you my iphone 5 for them if they are on 5.1.1