Something like what you describe is already possible in collections.  Here is a link to the admin page showing all the NES games and count and the value.

https://www.pricecharting.com/offers?status=collection&seller=dx2vp7qam7omfdwgu7jk6mw4f4&sort=starts&category=video-games&console=G17&condition-id=all

To get to that page I filtered my collection with the "Sort/Filter" box.

I selected "Video Games" for "Category"

Then "NES" for "Console"

I agree.  Closing as a duplicate though.  Please vote for the existing request.

https://pricecharting.userecho.com/en/communities/1/topics/1157-add-support-for-funko-pops

You can opt-in or out of dark theme now instead of using your device defaults you opt-in or out.

https://blog.pricecharting.com/2021/12/dark-theme-on-pricecharting.html

After you make the choice the option sticks with your device until you change it again.

Thanks for that feedback.  I'll work on a way to turn it on and off and I'll probably turn it off by default and let people opt-in instead.  Then the preference would be stored in cookie on that device.

Cool idea.  I'll wait and see how popular this feature is before working on it.  I'd probably do something that allowed you to make a separate collection of stuff you want to sell.  Then you can filter and include stuff in that collection or just add items manually without a filter.

We are working on it now.  Hopefully they are live soon.

Your welcome.  Glad you like it.

Right now you need to change your browser default if you want to disable it.  I'd love to know why you want to disable it though if that is your device default.  Is there something about it that you don't like?

I hope to add an on-site opt-out in the future.

Dark theme is live on the site.  You will automatically see it if your device is set to show dark theme by default.  

Please let me know some specific cards we are missing.  We should have all of these as far as I'm aware.  There might be some promo cards we are missing but the standard releases with EX and GX should all be on the site.  If we are missing them I definitely want to add them so let me know which ones we are missing and I'll look into it.