I'd go by the boston pinball sales figures over the Mr Pinball price book anyday.
Here is the latest
http://www.bostonpinball.biz/ebay112017.htm
Quoted from mcbPalisade:Can't get through to these people in Utah to order a copy.
Anybody tell me what this book lists as the price for Williams Blue Chip? Had someone make an offer on mine and only know what I paid plus put in. Thanks. mcb