You could make the same thing out of wood for a far lower cost, and wood is more static friendly than plastic.
The scrap lumber most DIY'ers have in their basement could make one large enough to hold a motherboard, the only missing components might be dowling which is dollars for feet.
I probably will use some dowels and scrap oak pieces that I have laying around.
Why go to all the trouble hunting up materials when I already have enough wood scraps laying around to do the job.