If you're trying to cash in on this Pokmon card market with your old 1999 base cards, here's what you need to be looking for Pokemon Base Set Single Card Common Fire Energy 97 Lightly Played ToyWiz It's described as the "holy grail" of Pokmon cards This rare, first edition card could fetch 40,000 when it goes under the hammer in Derbyshire. Read more: https: bbc.in 4tWj04x Most valuable 1st Edition Pokemon Cards Checklist & Price Guide