OK, actually lots of choices here:
My local Academy store sold me my Inova X5T for $29.95.
Got my Inova X1 for about 20 bucks. Uses single AA
Also under thirty bucks I have bought: ( I still own all of these)
Brinkman: Maxfire 2x123 and rechargeable version, both under 30 bucks
Streamlight: Propolymer: 2AA Xenon, 3N LED, 4AA Xenon, 4AA LED, Baton Light (3N, 3LED), Twin Task 1L, and the Syclone 4AA LED + Krypton (really versatile, really cool!)
Pelican: 4AA Stealth Lite, 2C Pocket Saber Light, 2AA Mitylite Magnum, 2AAA Mitylite, 4AA Mitylite, 2C Super Pelilite
Koehler Brightstar Responder: heck, the whole product line!: 1 AAA, 2AAA, 2AA, 4AA, 2C and 3C. (super rugged, some rated for 30 foot drop test)
All of these lights are really great choices for under thirty bucks. Some of those listed are incandescent and some are LED, should give you lots of choices to consider. All of them use easy to find batteries, as well. The Pelicans are super tough and can take lots of abuse. All have lifetime warranties.
Hope this information helps you decide.