Title explains it. I would like a feature for sorting my TCG collections when looking at a specific set, there isn't an option to sort by card number. The feature can be seen in a set lists search, but not within my own collection's list view. 

Add TAG as a grading option

I think it would be nice to be able to edit tracking info on a sold item. I've added tracking numbers before only to find I put it on the wrong item. It's also possible to add a blank tracking number and not be able to do anything about it.

Where you scan it and the value of the item shows up along with trade in value that you can customize the percentage of the trade in value

Add a filter option of ps4 games that are enhanced for ps4 pro. Add a little checkbox for pro enhanced when editing/contributing a new ps4/5 game. Ps5 pro is not out yet at time of writing but games are already receiving ps5 pro enhanced updates. Would be nice to see which games take advantage of more powerful versions of each distance hardware, and if it would be worth getting one.

I love the ability of generating a link to share my collection with someone.  However it'd be useful if the linked collection just listed the games and no values, or collection value. I think it comes across as bragging about the value of the collection, or of individual rare games, when I just want to share what's in my collection.

Like IMDB before, a message board on each game page would allow collectors to question others more quickly on specific games.

Collectors could allow to be notified when someone posts a message and if the message helps someone, Kudos could be given, creating a hierarchy of knowledge masters.

Some example:

- My version of the game (bought in the UK, new) came with only a manual, but no poster. Is that common?
- is the French version of this game censored?
- Anyone with the german version of the game can confirm how many languages are available on cartridge?

Some of these questions are actually mine. Sometimes, because Europe has many languages and it's an open market, I would love to buy abroad, but wonder if the game has other languages than just the one from the country of origin (and that would save me some headaches)  

It can also work as a place to discuss the game more in depth 

I live in brazil, about 99% of the games i have I bought here in brazil and the prices are extremely different. so i can't keep a good track of my collection price since the currency is very different