Hi. My wife is traveling overseas for the month of August and I need to get her a phone. I am planning on using the MaxRoam SIM card service (MAXroam - the global roaming sim that doesn't know that you're travelling) so I need an unlocked GSM phone. Here are my preferences, in descending order of importance:

1. Under $100 US
2. Full keyboard for texting
3. Quad-band

Size and battery life and such things are not as important to me. The price is the big one, since it may sit in a drawer after the month of August. Thanks!