This is because near-mint cards are generally considered to be in better condition and are more highly valued by collectors, which drives up their prices
Most of the new cards that come with these decks go for around 11 dollars, but Im sure that price will drop once the decks are out
After that you likely dont want to be casting your other dinosaurs, looking for other methods instead

Other printings of Deadly Dispute $1.26 Deadly Dispute 30th Anniversary Play Promos $13.36 Deadly Dispute Fallout $1.66 Deadly Dispute Final Fantasy: Through the Ages $3.59 Deadly Dispute Fallout $1.21 Deadly Dispute Commander Legends: Battle for Baldur's Gate $1.03 Deadly Dispute Adventures in the Forgotten Realms $0.32 Deadly Dispute Marvel Super Heroes Commander $0.77 Deadly Dispute Outlaws of Thunder Junction Commander Most valuable cards in Secret Lair Drop View the full price guide $3,000.00 Jace, the Mind Sculptor Secret Lair Drop $2,199.95 Shivan Dragon Secret Lair Drop $1,764.69 Mana Vault Secret Lair Drop $1,488.38 Snapcaster Mage Secret Lair Drop $816.32 Swords to Plowshares Secret Lair Drop $769.69 Counterspell Secret Lair Drop $717.37 Subtlety Secret Lair Drop $699.95 Merfolk of the Pearl Trident Secret Lair Drop More cards by Ben Maier $5.67 Stoneforge Masterwork Oath of the Gatewatch $5.66 Stoneforge Masterwork Oath of the Gatewatch Promos $5.62 Deadly Dispute Secret Lair Drop $4.63 Universal Automaton Modern Horizons $3.67 Universal Automaton Modern Horizons 1 Timeshifts $2.78 Autograph Book Unfinity $2.70 Dire Fleet Poisoner Rivals of Ixalan Promos $1.68 Siren's Ruse Ixalan SetSecret Lair Drop Most valuableTop 100 Magic: The Gathering cards You might also like...

A defense type of deck with new leader "Yamato", which can firmly catch all attacks from the opponents
Also, I'd really like to hear how you feel about this type of article: would you like more content like this, with general guidelines and theory rather than decklists and specific Commanders