Need a second phone

I just picked up my iPhone about a month ago, and it's working out quite well for me. However, I work in a kind of job where I'm likely to accidentally wreck my phone, and I don't want to gamble with something worth $600. So what I'm looking for is:

1) a phone that runs UMTS 850/1900
2) something that I can find used and unlocked for less than $80 (so, dumbphone not smartphone)
3) something small, preferably a bar or slider

That's it. Doesn't need to do anything but call and text, doesn't need to be the fanciest phone in the world. Any ideas? All ebay has to offer me seems to be a million and a half 2G phones or unlocked smartphones.
 
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