Two interesting things...
First off, when you're in Tracfone's online store, change the tech= part of the web address to GSM6 (from CO, GSM4 or GSM5) and reload the page. You'll get, though out of stock, the Motorola c139 for $15, the Motorola v170 for $40...and a pink Motorola c139 for $15! Again, these phones are out of stock and who knows what carrier's SIM they'd be shipped with (Dobson CellularOne maybe? SunCom?). But the pink c139 is interesting...
Second, ShopKo is selling Tracfones at sweet prices until the 21st of this month. You may even be able to have them ship the phone to you if you're out of area, or out of state...here are the phones...and yes, they run from $15 to $20 in discounts or are just plain available when they usually aren't...and yes, they're all SingleRate...
LG 3280 - $28.88
Nokia 2126i - $14.88
Nokia 1112 - $18.88
Nokia 2600 - $18.88
Sounds nice and cheap from here...especially the CDMA phones...$15 and $20 less than retail isn't bad. And the Nokia 2126i is a solid phone...cheap per minute and per text, too, with the $50 double-minute card.