Please add the Darkness Energy card 104/111.

Basically just let people buy and sell parts for video game consoles. A couple categories but overall pretty lax.

-Separate parts into OEM and aftermarket, allow buyers to filter between the two if they choose

-Pricecharting optional, if allowed then it only tracks OEM parts vs all aftermarket

-Specific aftermarket parts of noteworthy fame can have their own "Official" classification

-Allow buyers to filter by console and filter further by model, ie allow an Xbox 360 to be searched as 360 alone or further clarified to 360 slim

-If quality is a concern do not allow broken/ as-is parts upon immediate launch

The filter for region is a hot mess with the JP and PAL listings creating HUGE gaps between the NA consoles.  You have all the PAL and JP consoles batched together because of the names, but not the NA stuff.  We could REALLY use a top level drop down for the region, or just do with the NA what you have for all the PAL/JP and add "NA" or something in front of them so at least they're all together.

The chart on the My Collection page doesn't seem like it is tracking past prices for me, its only showing a visual chart from the date I began entering my collection. Is there a way to change that, is that a bug, or should this be a feature?

There should be a little number next to the current price of  a game in your collection that shows how much the game was when you added it to your collection so you can see exactly how much a specific game has gone up or down since you've had it.

Add an undo button if you accidentally hit remove all games while doing a lot calculator.