I used to use Mavin.io but find it tends to miss a lot of listings. Currently just use eBay sold listing searches most often but find it clunky and not user friendly to use.
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https://tcgfish.com/ is my favourite for graded cards!
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me too, it’s getting an upgrade at the end of this month too, very exciting
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I second that. I always use TcgFish, even if sometimes doesn’t have every cards available or (rarely) seems to have glitched pop reports. I love the clean interface, the charts are very intuitive and quick to assess.
130point should be good too.
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TCGplayer market price for modern cards
Ebay sold listings for vintage
I’ve started using the ALT app to quickly scan graded cards
I’ll throw in a new favorite of my https://www.pokedata.io/
Its not perfect, with some flawed data, but it is great to see an overall of all sections of a card and set from graded to tcgplayer to ebay.
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Ebay, tcgfish, psa apr
Probably in that order
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I like tcgfish the most
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I’m here, my friends. 
I need to apologize with the glitched pop report, that thing has been a pain to fix. I have not worked on that yet but it will be fixed. another reason that I have not worked on this: The other update will be the new integration of the Pokemetrics into tcgfish in the future, so it will bring the best pop report experience possible.
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Thank you for the great work! No rush on updates 
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