Phones similiar to the iphone?

What i want a phone to have:
- has your text messages in a conversation line
- touch
- $100-$150 on eBay or Amazon
- smart phone if possible
- can find Wi-Fi for free if possible

I have a t-mobile comet that is quite small, touch, android, with text messages in a conversation thread, and it is not expensive. However the keyboard is very small, and you really need to learn swipe in order to do any extensive texting or emailing. It is easy to turn the wi-fi on and off, and it is possible to do email and browsing from Mickey Ds or Starbucks with pay as you go without a data plan. It has a Froyo version of android and may not be capable of upgrading to a newer version because of the slow CPU speed and small screen.