You’re not going to see many mint 1965 Topps Tall Boy 5-cent Display Boxes on the market; I scanned this one from Mastro’s December 2007 catalog.
This empty box once held 24 5-cent packs, and one or more of them may have contained Joe Namath’s rookie card. Its minimum bid was $300 at the time, but I’m unsure what it closed at.
As I said, the box is rarely found, especially in mint condition. However, you may remember that in September 2017, MileHighCard Co. sold a full unopened BBCE-authenticated box for $145,746 and a box with 21/24 packs for $106,149.
Exploring auction history over the past few years, it looks like mid-grade display boxes have been selling for between $250 and $500.
Happy collecting, and don’t forget to check out The Unopened Archive!