I'd recommend the Samsung S3 for value & dependability

Nice upgrade for many users. My wife loves it. Screen size is large enough so that you can actually use it! Internet, texting, bluetooth.. etc.. its all there. Good value cause its a little older so the prices are a bargain & the features are consistent with any of the newer phones, so you're not missing anything important. As with many products on ebay.. I recommend buying products here with a return guarantee attached to the purchase. You'll know right away if it has issues & won't be trapped without a warranty should it be needed.