Many of them will offer cash upfront, usually based on market prices from sites like TCGplayer, though youll only be getting between 50-80% of a cards actual worth this way
In either case, there's a lot of room for some maneuvers here
Red-White Creature (26) Burning Sun's Avatar Charging Monstrosaur x2 Demanding Dragon Exultant Skymarcher x2 Frenzied Raptor Goblin Motivator Hostile Minotaur Inspiring Captain Knight of New Benalia x3 Pyromantic Pilgrim x2 Rustwing Falcon x2 Serra's Guardian Shivan Dragon Silverbeak Griffin Sky Terror x2 Skyknight Legionnaire x2 Sun Sentinel x2 Instant (7) Dual Shot x2 Inspired Charge x2 Lightning Strike x2 Moment of Triumph Sorcery (1) Enchantment (2) Land (24) Mountain x10 Plains x10 Stone Quarry x4 This Boros deck is a decently constructed aggro deck for playing against the other Starter Kit deck, but it has far too many vanilla creatures to be viable in any real format
Customization options can include card size, quantity, cardstock type, and premium embellishments
There are a couple of fixes to get rid of the excess air
Muldrotha lets you play a land and cast a permanent of each type out of your graveyard, letting you re-use the permanents you want to keep sacrificing