Staff Site Video Game Price Charts занятную published an article in which they are trying to trace the correlation between sales of games included in one series. As the graphs in retail, there is a certain pattern:a new game before the release of popular franchises, the sale of previous projects in a series of slightly increasing. For example, the price of the first part of Resident Evil for the PlayStation has increased for several items before the sale appeared in Resident Evil 5. Of course, we are talking about the resale of old products. A similar trend is observed in other series, true to the original price does not always grow up:the cost of Super Smash Bros. Melee has gone down since the release of Super Smash Bros. Brawl. According to the article, the best to sell the old games from the popular series for a month until the next continuation. Collectors often lead to such proposals.