I sell lasers and accessories, accepting bitcoin since 2012. I ship worldwide. The lasers are all built by me from parts, so these are pretty much unique. You won't find this powerful lasers except on a few select sites. Lasers are very fun to play with. Almost all my lasers have visible beams, some of them are astonishingly bright. I also sell several lasers that are powerful enough to burn, even set bare wood on fire without any assistance.
The lasers are sold in semi-assembled states. Some assembly is required, though it is very easy, takes only a couple of minutes are require no tools or experience. Selling the lasers like this makes them legal to import in most countries, so you shouldn't have to worry about customs.
I also sell some laser-related software I have made, for example LasershowGen which is for creating shows for laser projectors.
If you want to buy a laser, you must absolutely understand the dangers involved. A split-second of the beam hitting your eye, and you might permanently damage your vision. These lasers are absolutely not toys. I sell protective glasses and I absolutely encourage that you buy and use them.
Take a look: http://Bitlasers.com
PS: As for the verification rules, my username is not the exact same as on bitcointalk (grix vs grixm) but I can prepare a signed message anyway if necessary, just say the words
