These lots are definitely worth searching for, but you don't have to find them just on
ebay.
I know a few months ago, when I was making my weekly trip to my favourite coin store, I happened to walk in while a customer was there selling. This happens often in good coin stores; people sell coins, collectibles, and precious metals.
This particular lot was from a gentleman who'd just had a relative pass away, and he neither cared nor was interested in what was in the lot. It took three or four hours for the Coin Store rep to go through everything, and in the end most of it was just worth face value. But there were some odds and ends that were interesting and were bought by the store.
Since I was sitting there anyway, and the guys know that I'm very interested in world coins, they offered me about six pounds of foreign coins at five dollars a pound. (The shop mostly deals with
US coins.) I paid that price eagerly; I had seen about 8 crown sized coins in there all with silver content. Figured I was getting a great deal.
After I went through that particular bag, I had more than a great deal. I figure the bag was worth at least ten times what I paid for it, although I still haven't gone through and seriously investigated every single coin.
There were several Mexican Revolution coins, tonnes of silver Islamic coins, a coin from German Kiauchou, a handful of 1800s coins from varying countries, a nice batch of 1 & 2 sen Japanese coins from the early 19oos & 189os, and a whole lot more. :)
I'm rambling, but the point of the story is; yeah. These lots are out there.