Actually, you should have several choices of lights for $100 and even some that normally cost more but that you can find on sale.
Something to keep in mind is that some of the newer lights are now only using one CR123 battery instead of two and are getting comparable or longer run times from the bulbs with comparable or greater amounts of light (see example above). New LED lights seem to be more efficient than the older LED lights which were comparable or better than the Xenon lights. So check run times and lumen brightness when comparing models.
I would avoid anything non LED such as xenon. While they last quite a while, xenon bulbs do burn out. LED bulbs will last you 50,000-100,000 hours, or in other words, last longer than the rest of the light will last.