Is this worth buying?

I am considering buying a cheap(ish) diode laser machine.
I have looked on AliExpress and there are many expensive machines, but very few cheapies.
Does anyone have an opinion on this machine? CNC 3040 CNC Machine 5500MW CNC Router Machine Laser Engraver for Wood Plastic | eBay
Or, would I be better off buying one of these (much smaller) others?
CNC 3018 PRO 5500mW Laser Engraver Engraving Cutting Machine 300*180*40mm AU | eBay

But I do note, that one of the machines is 10W, and two of them also include a small spindle for CNCing. Also, I like the bed that is supplied with the smaller machines.

Any advice would be gratefully received.

I have a 3018. I like it.
It’s slow but it does very precise work.

Thank you John
It means even more coming from a staff member.

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