I have a Motorola L6 for T-Mobile... It's in pretty decent condition. Comes with a wall charger/car charger. Might even still have the Original Box/Manuals... PM me if you're interested.
If you wanted to buy her a new T-mobile handset, go to Target and buy one of the T-Mobile PRE-PAID handsets. The handset is discounted by T-Mobile and its profiled and locked to T-Mobiles network. This way all the features such a text message and web brower functions work. This way she gets a new handset with a warranty and you look like a hero. Prices start about $39