You could get the Motorla M for about $100, probably even cheaper now, since it's been out for a few months. It got really good reviews upon its release and was voted as one of the best phones to come out last year, especially due to the quality of the phone for it's price range. There are also a bunch of different customizable backs you can choose from for it when ordering it, such as wood, or engraved backs.
Otherwise I would look at an older model Galaxy S4 perhaps, since they are probably giving those phones away for free these days with a contract.