When live (prior to e intro), I was selling these +$2-$3 for the lower denoms. The 50f was very popular back then. Very few (collectors) even knew what the higher denoms were back then.

If the inventory is available in huge quantities like other obsolete inventories; I would think approx. $2-$3 each over face.

I use the comparison approach... a la the AC Playboy and Bahamia chips when they were advertised here and on ChipTalk...