Alright, this is probably the last one of these particular lights.
I ordered an Ultrafire Wf-501b 500 lumen reverse clicky, single mode, XM-L2 cool white light. What actually arrived is a three mode XM-L...has strobe and SOS modes also (triple click to activate), but at least the blinky modes are not in the way of normal use. Giveaway comes with a SoShine 3400mAh cell, and a NiteIze adjustable holster if you request it (winner can do that in the same PM with shipping info).
These lights are surprising good value, in my opinion. They are simple, very easy to operate, very easy to disassemble (I cleaned and lubed the threads already), and reasonably durable. (The one I use frequently at work has been dropped several times onto concrete and metal floors, and still works fine.) I just got done with my basic waterproofing test (simply submerged in a bowl of water, cycled through modes, and left for several minutes to soak), and it kept the water out just fine. Every WF-501b I have owned has had an imperfect reflector, but this one is decidedly better than average. This light does not come with any guarantee, from me or anyone else, but I have tested it out, and everything is working properly.
Your post must include "I'm in for the Ultrafire WF-501b". I'm making this available to anyone, international entries welcome! I will end the giveaway and draw names when I have four entries, so if you want in, be quick.
Good luck!
(If anyone who has won one of these lights in the past would like to share their thoughts on it, that would be appreciated also.)