If you need to catch up, you can check out the previous article, on card rarities, or start at the beginning with The Basics
One extra way a card can gain value is by having its condition assessed by an external body
Mishra's Domination Momentum Breaker Mornsong Aria Murderous Betrayal Nefarious Lich Nezumi Road Captain Out of the Tombs Parallax Dementia Parallax Nexus Plot Armor Predator's Gambit Purphoros's Emissary Raging River Raiding Party Retreat to Valakut Rhythm of the Wild Rime Transfusion Rite of Belzenlok Rite of the Raging Storm Roiling Vortex Rouse the Swarm Sandwurm Convergence Saproling Burst Seal of Doom Sleeper's Guile Sluggishness Smoke Song of Serenity Spinal Graft Spreading Plague Steely Resolve Sticky Fingers Stranglehold Summon: Kujata Territorial Dispute The Abyss The Sea Devils There and Back Again Tombstone Stairwell Treetop Bracers Undying Rage
or eternal formats like Legacy and Vintage (which allows you to use cards from every set of Magic , outside of curated banned lists, which differ by format)
That's just speculation, but it's just a cool item from Magic history that not a lot of people have or can get their hands on. The lots also include an empty box for second MTG expansion Antiquities, released in 1994, bundled with original wrappers for some of the boxs boosters
