Tiffany Problem
Cognitive bias where people assume that expensive and high-quality items are always superior to cheaper or lower-quality alternatives, based on the assumption that price is a reliable indicator of value.
EverydayConcepts.io
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Origin
From Jo Walton. Named for the problem where despite 'Tiffany' originating as a name in the 12th century, our perception is that it's a modern name, and would seem ahistorical in any historical context.