Professor's Letter is card #146 of 162 in BREAKthrough (2015), a Uncommon illustrated by 5ban Graphics. At about $0.95 it is the #84 most valuable card in the set. In a BREAKthrough booster it turns up about once every 15 packs.


















See the full BREAKthrough card list
An ungraded Professor's Letter from BREAKthrough sells for about $0.95. A PSA 10 is worth more, roughly $4.75 by our estimate, and a PSA 9 around $2.18.
It is a Uncommon, and it shows up about once every 15 BREAKthrough packs.
5ban Graphics drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open BREAKthrough booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.