I know heroguy is the man in the know on this subject, but msrp and value is debatable.
If I remember correctly from the comic con videos that were posted, Benny said the shirts were worth $20 and the Flash doll was worth $35.
That quickly raises the msrp value of the box. Then there is the added folded poster for annual subscribers and those are $20 (creases are free).
Value is in the eye of the beholder. If the box was ordered by a Markiplier fan they may not see the value. If it was ordered by a comic and sci-fi fan, they would see the value differently.
I am surprised that was the Tshirt we were waiting on. Very lackluster IMO.