Thanks for the added info. As you can tell I need to learn a whole bunch about dice. At least I could spot the loaded dice. Now I need a spinner for the ones that are made better, which means the lead may not show.

The unmarked dice are starting to disintigrate. I rinsed and dried them. Hopefully that helped with the flaking and might have slowed the process. (plastic does have a small amount of moisture)

Any wild guess on what unmarked "cheatin' dice" might be worth? Or should I eBay a set and see what happens?