The Rat Heart series was largely dedicated and gifted to individuals who performed and helped make Dismaland the spectacle it was. I've resold a number of these over the years, you can usually figure out who the giftee is by looking through the list of those involved at Dismaland which gives it an extra story. I did buy one/sold one on behalf of Pest Control shortly after Dismaland without a dedication, although I believe there aren't many without a dedications.