Previously collected by British advertising entrepreneur Jock Elliott, who died in 2005, these cards are expected to cost between 4, 500 ($7, 064.67) and 10, 000 pounds ($15, 698.09) each.

“There are about 67 people currently working on those offers, and for a small family-owned business like ours, that’s a really big number, ” Ms. O’Neal said.

Television commercials showed kids twisting apart Oreo cookies, licking the cream center and dipping the chocolate cookie halves into a glass of milk.