I'm an all-world collector and box lot addict. The only problem I have is in physically carrying the stuff, as I dont drive.
I find a lot of dealers can't be bothered with these things, as they need a lot of work and a general knowledge of all-world material.
The problem is to get genuine estate-type lots, and
ebay is certainly a place to avoid for this stuff. The so-called glory box -- the dealer got the glory, and he's selling you the box!