The $20 chip was the result of 2 cross-collectible "Betty Boop" bidders bidding it up. The $8.50 price is not much out of line in comparison to an $8 typical NIS price.

Unusual early bid behavior occurs occasionally with Hard Rock chips when unknowlegeable cross-collectible bidders throw in higher than necessary bids. The early HR Marilyn Manson chips on eBay went for $15-$30 before settling down to normal levels.