What should I look for in a crepe pan?
As long as you don't use metal tools with the teflon, I don't see why you shouldn't just go with that. Iron or steel would have to be very well seasoned (think cooking scrambled eggs). Besides, for $15 you aren't out a lot of money if it doesn't work out.

Edited to add: Teflon is when Alton Brown went with in the crepes episode of Good Eats.