For older sets, you'll know if you recognise the set symbol, if you don't the end date on the copyright range printed on the card tells you the year that set came out, and you can find a list of sets in many places (I have usually looked here, but wikipedia and scryfall also have lists) Finding the year will give you only a handful of symbols to compare
Confirm set and era, only Base Set uses the shadowless term
With normalcy beginning to return in the United States, the conditions of the Mew Oreo sales are different from the inflated Pokemon card prices
Perhaps once people see how well the deck is doing its performance will become a tad less dramatic
Following the grading of this Illustrator card, three more Pokmon Illustrators were graded by TAG within three weeks time as other high-end Pokmon collectors eagerly sought out TAG's technology and unparalleled presentation for their most iconic cards
All figures are estimates based on community-aggregated opening data