I have one and it makes enlarger alignment very easy. Nothing is more frustrating than an enlarger out of alignment--I speak from experience. My guess is they got a heap of darkroom equipment for a few bucks, so offer them $10 and see what happens. Used, they still sell for around $100.
I have one still in the original box and packaging.
It has the laser box
1 glass plate 5 1/2 x 2 1/2 inches
3 glass plates about 3 x 1 inches, 1 has a white label in the middle?
A rubber band Thingy for holding the glass plates
An Allen wrench for opening the case to change the battery
A few notes:
1) The 4 screws that hold the top plate on should be loose. If they are thight, it warps the plastic box slightly, then it wobbles. Of course we know 3 points define a plane, but they put it it a box with 4 feet, so if it is only slighty warped it wobbles.
2) The laser alignment itself is adjusted on 3 points with setscrews.