I have some cards from Halo of Awakening set that I’d like to add but there isn’t even a Battle Spirits or Battle Spirits Saga category option.

Adding final fantasy trading cards would be nice

Issue: Data users have bothered to input into their collection is useful and the inability to export this is a significant frustration, especially if wishing to use price charting as their main database. 

Solution: Adjust the export query to include all fields that are captured in the input screen of an item in the collection. Given the fields are already present in the data base of the items this can't be a significant change to the query.

Like the new coin price guides and trackers, how about Vinyl records next? (Probably starting with VGM based ones and working backward to other genres of music)

Being able to prioritize which games, systems, accessories to acquire first based on desirability would greatly improve efficiency of purchasing efforts.

When a user enters a eBay sale, there should either be an option to input the condition or when the data is scraped the condition from the listing should be utilized. This can be utilized for further analysis or even deciphering how one’s own game compares.

There are a lot of manga volumes and box sets out there that are collectable and rare whose prices could be tracked.

Sort a collection page by issue number or card number.  This would be similar to sort option available on search and browse set pages.

Watara supervision was a failed gameboy competitor with over 60 games, three hardware revisions and released in multiple regions, including US, germany, UK, and some asian countries. It is currently not possible to add either the system nor the games properly.