I need a new iphone. Where did you buy a used one?
I ended up getting it on ebay. I have bought many items there and am mostly happy.
I have also been thinking about getting a google pixel, have you heard of them?
Yes, I heard that google pixel is one of the best Android phones out there. I am a loyal iPhone user, so have not used any Android phone.
I have only used Iphone also, but the cost of andriod is so much less. 
The initial price of android phones are definitely much cheaper than iPhone. However, the resale price of iPhone is much better.
I didn't think about resale, that's a good point. I have never sold my phones though. They usually are too damaged from use. Have you sold one on ebay?
Yes, I sold one of my old iPhones on ebay. It was pretty easy. However you have to be careful about fraudulent "buyers" trying to steal your phone. 
Have you heard of Gazelle? It's a service for selling your iphone. It seems like a good idea!
No, I have never heard Gazelle. How is it different from ebay?
You just send it in, no dealing with buyers or anything and you don't even have to pay shipping. It seems very easy.
That sounds very appealing. I have to check it out. However, it's generally a rule that if you get convenience, you usually have to accept a lower price. But that is fair, right?