Collector's Curse

Collector's Curse is the strange situation where someone will buy large quantities of random items (cloth dolls, physical game bundles, pop figures, etc.) in a sporadic shopping spree. This is usually done by said person in hopes that, one day during their lifetime, said objects will be worth a fortune.

Similar to:
Hoarder
Scavenger

Randal bought out all of Wal-Mart's fish tank decorations. I think he may have the Collector's Curse