A best bet is the refurbished
Pantech Pursuit II Smartphone for AT&T in Pink (pictured) or Green for . That's $40 under the lowest total price we could find for a used unit (this one's refurbished). This quad-band 3G smartphone features a 2.8" QVGA touchscreen, full keyboard, 2-megapixel camera, built-in GPS, micro SD card slot, and more.
1 cent with free shipping
Note that a $36 activation applies, and no warranty information is provided.