Wanted: old windows, timber, and corrugated metal (Powell)

I'm going to attempt to build a greenhouse this next year to keep my plants safe from all these deer and goats.
Looking for free building materials.
If you have a building that is half down or are in the middle of a house /trailer demolition and are just going to throw the stuff away I would really appreciate you letting me reclaim some of it and give it a new life.
Condition doesn't have to be great, just not cracked/ broken glass.