T331 College Yells stamp series.
And that reminds me, this auction ended last week, and I didn't see anyone talking it up.
Postaco Stamps
Thought it was a pretty nice collection and seemed to go for less than I expected; last post about them I could find here said that commons went for $25-40 each. So to get that many HOFs in the lot was probably a steal at $20 apiece.