It would be useful to set a filter to only show search results of a specific language 

When looking in my wish list for cards I may want to purchase, It would save a click if there was a "buy" button next to each entry instead of clicking the card's page and then clicking the buy/sell button

Every item seems to be stuck at the last 30 sales.  The should be a way to look at the full history.

Would like the option to include Tag in the "what grade" and or "grading company selection" 

Japanese versions should be added to pricing

Can you please add the Union Arena card game by Bandai? Union Arena has been out in the United States for over a year and continues to gain traction and popularity among played card games. Each set is focused on a popular IP such as Bleach and Jujutsu Kaisen. 
The card game also draws a lot of popularity between card collectors. The alternate art or chase cards often maintain high value, similar to Dragon Ball and One Piece.

Add Looney Tunes cards

It’d be awesome to sort my wishlist by release date—so I can chase my must-haves from the classics to the latest drops.

Add psa graded funko values

On eBay there is an “item location” filter. Things very useful as prices can vary regionally. Having the option to filter estimated prices by region so it only takes into account, for example, items sold on eBay where the item location was “UK Only” would be superb.