I saw this thread and wanted to give my two cents as the co-owner of VGPC. As Ack said, our prices are based off of multiple websites and we use actual ebay sales to update our prices every day. The "used price" we show for every game is the 7 day average from all the sites we pull from. We do this so it is timely but not based upon one day's data which can change a lot.Ack wrote:VGPC is based off specific Internet sites, and they tend to update their materials every day. I don't know how often rarityguide.com updates, but I don't think they update as much, though they've had rarer materials.
If anyone has any other questions about the prices let me know and I will gladly answer them for you.