It aggregates card prices from multiple sellers and shows low, market, and median prices
What's more, the story bits we got about what happened when Glissa, Slobad, and Geth exited Mirrodin's core is a bit on the vague side, and I suppose there's always a chance we'll see him in a new compleated state
This nostalgia, combined with a wealth of dramatic illustrations and card types, have contributed to the value of many cards, regardless of each variants age
Theres 15 cards in a pack, and while they were introduced at costing an already-pretty-high $13, more often than not they now retail for $20-25 per pack (Wizards removed MSRP standards from Magic sets just one month after it introduced Collector Boosters
Some people buy legitimate packs, replace the real cards with fake ones, and reseal them