Pokémon sets › BREAKthrough › Professor's Letter

BREAKthrough Professor's Letter Pokémon card

Professor's Letter #146

BREAKthrough · 2015 · Uncommon

Ungraded · UK

£0.35

PSA 10 · UK

£24.40

Ungraded · US

$0.40

PSA 10 · US

$33.06

Low confidence 271st most valuable of 306 priced cards in BREAKthrough

Rough guide — limited market data — lower-demand card, low-value, bulk-traded.

Priced against the UK market and refreshed weekly — adjusted where UK collectors reliably pay above the US average. We have not yet seen enough recent UK activity for this card to read it directly.

UK ungraded · 15 readings, May 2026 to Aug 2026 -34.0%

30 days-59.8% 90 days+20.7%

Peaked at £1.09 in August 2026; lowest £0.22 in June 2026. PSA 10 moved +0.4% over a comparable period.

UK price month by month

Month	UK ungraded
May 2026	£0.29
June 2026	£0.32
July 2026	£0.87
August 2026	£0.35

UK guide prices, with the US market alongside — updated 30 August 2026. Each market is priced from real market data in that market. Estimates for collection tracking — not an appraisal or a quote.

Check recent UK sold prices on eBay →

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