Here is one tool company (Laguna Tools), that traditionally makes high-end woodworking machines and great CNC machines, just entering the laser cutter/engraver market.
Their 12"x20" 40Watt laser starts at around $5000.
I did watch their video though, covering the alignment of the optics, and I have to say that the Glowforge with its promised pre-adjusted/aligned optics that are locked in for good, sounds much better. Provided, of course that all starts well and stays well adjusted.
I’m still hoping and waiting.