The "Bones" bone containers spawned in many containers during a period of a few months I remember, can't remember the time, probably around 2001, every single hour, up to 100+ containers had a chance to spawn these bone containers and players like myself would collect 1 of each type and bank them, some players obviously farmed these boxes and thus there are probably easily 100,000 of them floating around, their value depends on the buyer, 5k to 100k each.