Saving a Buck on 'Despards' ???? not a chance, they are horrendously expensive the single poles are 7-8 dollars a piece and the three-ways were almost 11 bucks. and thats just for the switches, then you need the retainers and the cover plates.
I redid a group of 6 and 3 and two 2's in a kitchen and dining room and it also had mates in the garage in two places and the total material layout was almost 160 dollars. one problem I had was trying to order a 6 position switch plate, I tried to talk the customer into Decoras but no chance he father had built the house 60 years ago and it had to be just they way he built it.,

I have no idea why these things are so expensive.

Wm.Colt