If you like attacking every turn and rushing the opponent down, choose Red (e.g., Leader Shanks )
Unlike my hidden gem list, I ignore popularity for this list
Competitive players tend to buy single cards that they need on more reputable sites, and they dont buy big collections like this on Craigslist or eBay

Approach of the Second Sun As Luck Would Have It Azor's Elocutors Barren Glory Battle of Wits Biovisionary Call the Spirit Dragons Central Elevator // Promising Stairs Central Elevator // Promising Stairs Chance Encounter Coalition Victory Darksteel Reactor Doctor Doom, Unrivaled Duelists' Convocation International (playtest) Epic Struggle Felidar Sovereign Form of the Approach of the Second Sun Gallifrey Stands Halo Fountain Happily Ever After Hedron Alignment Helix Pinnacle Hellkite Tyrant Jace, Wielder of Mysteries Laboratory Maniac Laboratory Maniac Liliana's Contract Luck Bobblehead Mayael's Aria Maze's End Mechanized Production Mortal Combat Near-Death Experience Now I Know My ABC's Ramses, Assassin Lord Revel in Riches Shinryu, Transcendent Rival Simic Ascendancy Test of Endurance Thassa's Oracle The Cheese Stands Alone Triskaidekaphile Twenty-Toed Toad Wowzer, the Aspirational (playtest)
Red, green, and colorless make up the rest of the banding card colors