We actively encourage players to seek out cards from the Expanded Format (and earlier!) for the Raid Boss deck
A single PSA 10 Charizard is worth more than many new cars

The rarity table for Base Set 2 is give below: image881763 16.9 KB The uncommons sheet (including the obscured cards) is as follows: Dodrio, Butterfree, Machoke, Defender, Arcanine, Dratini, Exeggutor, Dewgong, Energy Retrieval, Haunter, Farfetchd, Ivysaur, Marowak, Full Heal, Fearow, Kakuna, Magikarp, Maintenance, Charmeleon, Lickitung, Nidorina, Rhydon, PlusPower, Growlithe, Persian, Nidorino, Poliwhirl, Pokmon Center, Growlithe, Raticate, Parasect, Machoke, Pokdex, Pokmon Center, Tauros, Weepinbell, Seaking, Professor Oak, Jynx, Double Colorless Energy, Butterfree, Marowak, Super Potion, Magikarp, Magmar, Haunter, Exeggutor, Dodrio, Seel, Defender, Arcanine, Seaking, Kadabra, Weepinbell, Energy Retrieval, Jynx, Dewgong, Farfetchd, Ivysaur, Rhydon, Full Heal, Haunter, Fearow, Kakuna, Wartortle, Maintenance, Charmeleon, Lickitung, Nidorina, Machoke, PlusPower, Magikarp, Persian, Nidorino, Dewgong, Pokmon Center, Growlithe, Raticate, Parasect, Poliwhirl, Double Colorless Energy, Marowak, Tauros, Weepinbell, Charmeleon, Pokdex, Magmar, Double Colorless Energy, Seel, Professor Oak, Arcanine, Dratini, Butterfree, Super Potion, Rhydon, Defender, Farfetchd, Parasect, Poliwhirl, Kadabra, Fearow, Exeggutor, Seaking, Energy Retrieval, Lickitung, Ivysaur, Full Heal, Professor Oak, Dratini, Kakuna, Super Potion, Wartortle, Maintenance, Raticate, Nidorina, Seel, PlusPower, Persian, Nidorino, Wartortle, Kadabra The commons sheet has the card sequence shown below

Chart shows the price of Drampa #15 at the end of each month going back as long as we have tracked the item.
With no current PSA 10 listings online and a VERY low PSA pop report, a gem mint card would give you some SERIOUS return on investment (easier said than done, I know)