Thanks for this suggestion.  We don't have that feature now, because people could have multiple copies of that game in their collection.  We don't know if that version was the one in their collection or a duplicate they are selling.  

At some point we plan to let people convert a collection item into a "for sale" item, and then those will automatically be removed.

I've added Nidoran.

https://www.pricecharting.com/game/pokemon-base-set-2/nidoran-83

I think all Mew #9 Promo cards are holo:

https://www.pricecharting.com/game/pokemon-promo/mew-9

Please correct me if I am wrong.

All Base Set trainers and energy cards are shadowless so we don't have them listed separately.

This has been added now.

https://www.pricecharting.com/game/playstation-4/twin-breaker-a-sacred-symbols-adventure

This will be searchable in the near future, but it was just recently added.  Our search index takes a while to update if that search term has already been stored.  If you search for "Killer Queen Black Pal" you will see it come up in the results.

Thank you so much for this very thorough information.  Very helpful.  I didn't even know those cards existed.  

I've made some notes on this feature and I'll wait to see how popular it is with other people before doing any work on it.  I'm guessing we would add other trading cards first like YuGiOh but it all depends on user demand.

Unfortunately this isn't a feature at this point.  That has been reported by some other users as a feature request they would like, but the graphs only support US $ at this point.  Sorry.

Thank you.  I've fixed this now and added the secret rare card.

https://www.pricecharting.com/game/pokemon-sword-&-shield/air-balloon-213

What are these Limited Run games trading cards?  Do they make one with each game they sell?  Or do they sell those trading cards separately?  Sorry I don't know anything about the trading cards from Limited Run.

I've added all of the POP Series booster packs now.  They will show up on the site in less than 24 hours.

You can view other collections but only if someone shares that collection somewhere else.  Or you know that person somewhere else.  So we don't have the social component in terms of finding fellow collectors and connecting with them, but if you connect somewhere else you can view their collections.

I'd love to hear your thoughts on how a "connect with others" feature would look.  What features would it have?  How would you connect?  etc?