Any commercial electronic store will probably have them.
Most handheld lasers are made in China, and I once purchased two green lasers from a renown Chinese website: http://www.laserpointerpen.net , one is the 150mW TOPLASER series green laser, the other is the 200mw Ancient Laser series red laser, both lasers works well and overspecsed ever since. There are many shoddy lasers in today's market, and just watch out the shoddy laser scam of some sellers.
You can purchase a laser pointer at your local Walmart, Target, or Radio Shack. You can also purchase one online from the Amazon website and have it shipped directly to your house.
staples
WalMart is a store that sells many items online. You can purchase cheap laser toner from WalMart and they will have it delivered to the store for free or to your home for a nominal cost.
There are many stockists of lasers in the UK. A good source is ebay if you are looking for a laser pointer. Another is laser pointers. Amazon is also a good source of different laser pens and pointers.
Laser distance meters can vary in price. $100 will get you a quality meter. WalMart is a store that sells many items online. You can purchase a laser distance meter from WalMart and they will have it delivered to the store for free or to your home for a nominal cost.
It strictly depends on the strength and power of the laser pointer/s that you are using.
Lasers have many uses, laser pointers, cd/dvd/blu-ray players and writers, Optical tweezers, Laser cooling, Communications, just to name a few.
I have seen many mixed Mideast uses for lasers cutters, from glass to paper. Personally, I do not have one, but know from experience they can be useful. Laser clutters can be expensive, I can't imagine someone owning one without a specific purpose.
Laser multifunction printers can be purchased at stores such as Staples. Staples sells many brands of laser multifunction printers for their customers.
because the color red draws your attention so you can see it easier and it is incredibly common
There are many different sites and stores that sells a 5mW green laser. One site that can be trusted and sells green lasers is Amazon and it is easy to order from this site.
The company who manufactures and produces laser jet 5500 toner is HP. Many companies sell this toner is store though including Staples and Office Depot.
The Lampe Berger Lampe store sells many products. The store sells lamps of many colors and designs, oils of many scents, and fragrances of many scents.
Because the red ruby laser is the cheapest. Green lasers are usually more expensive. And the blue lasers found in blu-ray players are even more expensive.