I get that the older cards are generally more expensive due to circulation, demand, etc... but I'm talking more along the lines of cards as recent as Shadows Over Innistrad and Eldritch Moon. It seems these were some of the bigger offenders with many cards in the $0.50-$3.00 mark jumping up 200-300%+ in value since Amonkhet.
I imagine I'll have to wait for the Zombie craze to die out. I'll stop with the puns
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I do welcome our new feline overlords, however, and I hope they help beat back Zombies even just a little.