Closing as a duplicate.  Please vote for the first request for this.

https://pricecharting.userecho.com/en/communities/1/topics/1146-what-about-yugioh-cards-though

Love the idea.  That would be very helpful.  It is a very complicated problem though.

Great suggestion.  I can definitely see the value in having that calculate and shown as a running total.

The request features forum is totally different from the website.  We don't really use the log in features on the request tool

This is already requested.  

https://pricecharting.userecho.com/en/communities/1/topics/398-amiibo-cards

Database of Amiibo cards is here:

https://amiibo.life/

Cool idea.  I know what you mean about forgetting about a particular game after playing hundreds of them.  I'll see how popular this idea is before thinking more about the implementation.

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