The following game: https://www.pricecharting.com/game/famicom-disk-system/tantei-jinguuji-saburou-kiken-na-futari-kouhen has misspellings in the title and should be fixed.

The title should be the following: Tantei Jinguji Saburo: Kiken na Futari [Kōhen]

The following is the same game, the correct one is Nazo No Murasame Jo. 

https://www.pricecharting.com/game/famicom-disk-system/the-mysterious-murasame-castle
https://www.pricecharting.com/game/famicom-disk-system/nazo-no-murasame-jo

Many card grading companies offer half grades. Please add the option to include half grades in the drop down menu when adding a card grade.

How about being able to catalog US paper money?

Everything pretty much goes off of the catalog numbers of the notes. Colnect website has all of them pretty much

For UK collectors, add an integration similar to GameStop price comparison for the retailed in the UK called CEX.

I got a NES cart with a broken corner. It's missing some plastic, and there's a hole and some crack running from it. The game is in working condition. When selling, there's no way to really report this. There should be a Condition about this. All I can do is check "Scratched" and include a photo with obvious details. See:

What are your thoughts?

The ability to see the mean for all your wish-listed games,cards,comics and coins.To some people this may seem tedious already to have to click on the item type in the price and repeat and would possibly be frustrating to the folks who have   wish-listed products they consider as their own separate genre or category.Which is why I Mainly propose a this feature or one similar and also feel that there should also be a feature to see the price of items from the wish list page.Following that there could be the ability to add or remove some from the median or have multiple that are able to be titled.If the previous feature I just mentioned doesn't get added in the same way then there could be the ability to see mean median and the full price for folders.Not to mention that the wish-listed items doesn't have any folders available yet.

Make games able to be grouped into rating. If M (Mature), T (Teen), Ect