Also check eBay listings (vintage & graded)
For casual play with the original 151 Pokemon, though, every card you pull carries collector value alongside its play utility
Its good at teaching you when is the best time to use counters, how to reserve manage for plays on the opponent turn and finally, how to utilise flash cards, so you get the most out of them
Both of these cards traditionally see the most play in competitive combo decks, however, focusing on finding the pieces to generate infinite mana with combos like Basalt Monolith + Rings of Brighthearth or Isochron Scepter + Dramatic Reversal
(Though it's nowhere near as impressive as the $180K+ that a graded version of the 1999 Charizard sells for!) Other cards from the Topsun set sell for anywhere between $20 and $500 on average , although some of the more common cards drop to single digits