When you sell an item, it is no longer in your collection as you have sold it. I think it should automatically be removed.

Motion based console that was before the Wii

I've loved this website for organizing video games, adding in pc games, and pokemon cards was a huge plus for me, I was just wondering if there were plans to add other trading cards? I have YuGiOh

Other cards would be great too.  Skylanders, Dragonball GT, Bakugan, and tons of other tcg's I'd love to catalog. 

It would be very helpful if there was some indication on the site about how in-demand a game is to be purchased on the site.   Either giving the total # of people who currently have the item on their wish list or a more generic statement saying the item is in high, medium, low demand.  Those of us who sell games can then use that to help push more inventory with a better idea if it will sell.

The historic game charts and collection charts always show values in US instead of my currency of choice.

Add value columns so I don't have to click on every game to see if it's gone up or down in value; literally just linking the data which is already displayed on individual game pages.

I would love when evaluating a lot of items to be able to change the quantity of that item if I am valuing multiple of the same item. Have a quantity bar next to the Condition Tab so I can quickly change the quantity from one to 5 on for example NES controllers.