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Otherwise you could try *link removed* or the Beach. :) They're pretty extensive - not 100%, but definitely tons of data on there, and thousands of scans on PokéBeach.
The best way to get something like that is to buy a beckett price guide. They're pretty handy, and a good guide will show the pictures of the cards, and show mistakes that may make a card unique :)
I myself have an old beckett guide back from when charizard was worth $240 XD a while back, as you can guess.