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Regular sentimental indulgences may feel harmless, but they can reveal something deeper about how we value money.

Advertising Disclosure: When you buy something by clicking links within this article, we may earn a small commission, but it never affects the products or services we recommend. That warm, fuzzy rush of nostalgia can be powerful — and expensive. Whether it’s dropping $300 on a vintage Nintendo system, splurging on concert tickets to see the band you loved in high school…