Found this on Ebay and ordered one myself thought i would share this find with everyone here.
http://www.ebay.com/itm/XTAR-WK42-190-LM-compatible-with-CR123A-16340-battery-CNY-promotion-/291672627297?hash=item43e90b1861:g:i6YAAOSwQJhUdJZl
I have purchased several lights from this seller all have been genuine.
The Xtar store has a few other things on sale too
Had to order one. Oh well, I didn’t need that 17 bucks anyway.
I almost ordered one of theses too.
http://www.ebay.com/itm/301333492086?\_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
thanks for the info!
I ordered from them before. Good seller.
I’m waiting on mine from GB. Ordered it 2 weeks ago for $14ish
Some pretty good deals there. I bought a WP2h to try out some 4.35V cells :-x
I’m always on the hunt for a good deal.
I also almost ordered one. Ended up ordering two.
I had to choose between the wk50 and the wk42 I just couldn’t afford both…. The wk42 seemed like the better deal.
Looks like a great deal. Unfortunately no postage to the UK.
Hey! As an European, I feel discriminated. 
“This seller doesn’t offer international shipping”
Got mine this weekend and couldn’t find my 16340 cells :-/
I like the looks and size might be my new EDC.
The Wk42 is now my first EDC light. never have edc’ed a light before now. This thing is an excellent light. Due to the size and weight you forget you even have it in your pocket. Now the question is do i still get the Olight S1 as well……hmmmm.
Ordered a WK42 and a WK21 from this seller. The listing for the WK21 stated it was a 2 mode light. When I asked about this, they said that the reason they claim only 2 modes is to not let the customer down when using a CR123 and some modes are lost due to power.
Upon receiving the WK21, I noticed it has already been soldered to where it only has low and high. I feel like I was lied to. Awaiting response from the seller.
The ad description was very clear it is the two mode only version. The two mode version is much cheaper than the five mode version and more useable, IMO. If you want to customize the settings, you can resolder as per the detailed instructions in the manual. Or you can send it back and buy the more expensive version.
I like the CR123 comptability although 16340s will deliver more juice.
Description did say it had 2 modes, but, when I asked the seller, they said it has 5 modes. And that they listed it as 2 modes because of different power levels of the CR123 and the 16340.
We’ve sent about 3-5 messages back and forth before I made the purchase and they never once mentioned that it was pre soldered with only 2 modes. I would unsolder the connections but I don’t own a pen. I’m very new to flashlights.
This is the message they sent me when I asked about it.
Dear Friend,
Thanks for your question. We are sorry for the troubles it caused. This listing is about the same product as you have noticed in other places. It truly has low, mid and high 3 modes. We advertise it as 2 modes for we think it’s our former products and due to capacity of batteries, the high mode can only run about half and hour. In order not to disappoint our good buyers as you who may have a high expectation for its long run time of high mode, we describe it as 2 modes as a modest claim. We sincerely hope to have your kind understanding and apologize again.
If you have any other question, please feel free to contact me. Thank you!
Best regards,
Next time put un US ONLY or something like that in threads title.