If you're in the Scranton area (fan of The Office, perhaps?), I would highly recommend taking a swing by the Olde Good Things Warehouse. They're an architectural salvage company, with stores in NYC, LA, and Florida, and they sell to dealers and at flea markets (like the Brooklyn Flea) in other places. But their warehouse is insane. An old brick factory building filled to overflowing with all manner of doors, mantels, fixtures, stuff, junk, and so many interesting architectural salvage pieces that one could spend hours looking at it all. If you happen to run into one of the people that work there when you manage to find your way in (the place is that crowded and maze-like), they have maps of where things are, with stuff grouped in sections inside the warehouse. And there is tons of stuff outside too, iron fences, stone columns, huge ship moorings, more bathtubs than you've probably seen in one place...