[quote name='gamereviewgod']No, because the two usually do go hand in hand. The vast majority of truly rare titles do go for high amounts. The problem is that amongst the true gems, you have people spending $70 for Chrono Trigger, which is nearly dirt common. Unless you know what's truly rare, you'll be spending far more than you should.[/quote]
Truely rare games make up a tiny percentage of all games sold. Both are great resources, but for the average person, EBAY is going to be the tool of choice.
This is because demand, not rarity, is the most important driver of price. Ebay is far better at showing demand than digitpress, which is a terrific tool for showing rarity. A rarity without demand is not going to have a high price, though a common item with demand will.
In all cases, it is best to be as knowledgable as possible, meaning you'd want to consult all possible resources (with these two being chief amongst them) before making decisions, however, if you were going to use only one tool to base your purchases on, Ebay would be best for that.
I suggest this rather bold statement on the fact that you can see real-world information on what the item has been selling for in both the near term and the long term, which is far more valuable than just a simple rarity number and a suggested price, as we can get a statisically significant sampling of this data, and based on the historical information granted us, make informed decisions on the current going price, and make fairly accurate predictions as to the trending of that price.
Remember... something is only worth what someone is willing to pay you for it. Based on that concept, Ebay is the superior tool... it shows us what something IS selling for, rather than what something SHOULD be selling for.
