HGSS Black Star Promos #HGSS18/25
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Cardmarket currently provides a trend price for Holo of about €148.00. Treat it as a live reference, not a guaranteed sale price or appraisal.
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Instead of a generic compound-interest calculator, this model starts with the exact card's current market reference, short-term market trend, and Diamond Finder Collector Index.
Model estimate, not a guaranteed future value. It does not use eBay sold comps yet, and no projection should be treated as investment advice.