Greetings from the UK!
I'm selling these pens on my eBay page; it's easier to manage that way.

Specifications:LED - AVAGO HSDL-4271
Power Source - 3 watch batteries (AG10 - 1.5v).
Switch Location - See images
Cost - £4.99 ($7.72)
Postage Information - Standard postage is £2.99 ($4.43)
Click Here for Pens
Any questions, just contact me through my eBay page.
Thanks a lot