Professor's Research #224/S-P #224 — Promo

PriceCharting market prices as of 2026-10-20:

Market context: ungraded price -52.5% over 30 days. +0.9% over 90 days. PSA 10 premium: 65.2× ungraded.

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Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-japanese-promo/pokemon-japanese-promo-professor-s-research-s-p-224