I got my window glass from the local salvage yard. Last year, they were crushing everything as fast as it came in and got hard to grab a door off an old oven. I finally got one and I think it cost all of $0.75 or there abouts. I pay 15 cents a pound for scrap and picked up a bunch of stuff that day so the cost is a guess. (Might even have been less.)
I've found some great treasures there. If you recognize the equipment, some mighty fine parts are there for the taking. Magnetic switches, relays and mercury switches were plentiful for a while. I even got my 4-ton Whitney-Jensen punch press there. Back then I was paying $0.10/lb. so the punch was about $12.
The point is, don't discount used material.
