I was going through my old files and just found this picture that a collector friend sent me many years ago. It may be the rarest of the NFL Football Promo bobbing heads. It's the Dallas Cowboys and it is the only known example. Over the last few years, the prices on these promo dolls have escalated in leaps & bounds. Last year a N.Y. Yankees promo doll sold for over $60,000. With the popularity of the Cowboys and the rarity of this Cowboy promo - who knows what this doll could fetch on today's market.