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Help to buy a Laser

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Jasonbit:
Hello guys,

I am looking for help to identify a place where I can buy a laser for a CNC Laser. I googled on Ebay and I found this: https://www.ebay.com/itm/15W-Laser-Head-Engraving-Module-w-TTL-450nm-Blu-ray-Wood-Marking-Cutting-Tool/183757888176?epid=24012513715&hash=item2ac8d2dab0:g:UNYAAOSwTi1bbr2I

This seller asks for this product $109. This is a normal price or I should search anothers salespeople?

[UPDATE]
I am a newbie guy on electronic and I intend build a simple CNC Laser to do some stuff and start learning more about CNC and Lasers.

Fred27:
Your best bet would be to look at the K40 40W lasers you see on eBay. You get a working starting point for and a proper laser for about the same price as the laser and PSU on their own.

They're common and well documented - including their faults. The electronics are rubbish, but any EEVBlog reader should be OK with sorting that out.

The usual disclaimer: Be careful and keep your eyesight.

Domagoj T:
What do you want to do with a laser? 15W is fairly limiting. You should not expect to be able to cut more than some card stock and mark wood with that.
Couple of years ago I bought the K40 for about $400 (and spent another ~$400 on various stuff to make it a bit better). It's 40W, fully functional machine (but horrible software). By the time you finish building a machine yourself it will be more expensive than that and not nearly as good.

If your goal is just learning about and building a CNC machine, you don't need even that. :-//

Jasonbit:
Thanks to your answer.

Therefore, I must invest in a laser of at least 40W. It is?
Is the model "K40 40W lasers" a machine?
()

I live in an apartment and would like to build a CNC. But a they make a lot of noise  |O I will choose to replace the wood routers with a laser. (the aim is not to cut wood. But mark or cut plastic). The cnc and engine structure is almost finished. Now the laser is missing, which is a new world for me.

[UPDATE]
Maybe I will consider the wood router  :o
()

moffy:
I have one of the "15W" blue lasers with a little CNC. It is really a 5W diode, but very powerful. I got a custom orange transparent acrylic cover made to avoid blinding accidents. It is an impressive diode and has no trouble burning wood.

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