No idea, since I only care about real-world sales history when determining a price. Do you take someone's word for a price, or do you learn what people are actually paying for the coin?
@ibuycoinsoffebay - try this for a guide; http://www.coinsociety.com/priceguide It's based on ebay sales (sold) prices for PCGS/NGC/ANACS graded coins. It's not perfect, but I find it to be a good barometer of actual selling prices in the real world.
