Also If your eligable to upgrade you can get a Treo 650 Refurb for $139.99 on Cingulars website!

 

look for any unlocked GSM Treo 650 on craigslist or ebay, they're pretty cheap for the most part. Sprint versions of all phones are so much more expensive, arg...I still have a treo 600, 650 seems much better, although I really wanted the flip form factor the samsung i500/i600 has