A portion of financier Bill Gross’ stamp collection sold at auction Wednesday evening, October 3rd, for $10 million. That is a record for a single-day philatelic auction.

The sale, by Robert A. Siegel Auction Galleries, is the first of several planned for the next 2-3 years.

The top lot was a center-inverted block of four stamps from 1869 that fetched $737,500 (including the 18% buyer’s premium). [shown on right]

“A lot of these iconic items were bought by a billionaire and now they are dispersed among the riffraff,” Arthur Przybyl, chief executive officer of Ani Pharmaceuticals Inc., told Bloomberg News. Sitting in the first row, he won the night’s second-most-expensive item: a blue Hawaiian missionary from 1851 that brought $619,500. “I lost a lot, but I won the stamp I really wanted.”

The 74-year-old Gross has the most complete collection of U.S. stamps anywhere. A bond portfolio manager at Janus Henderson Group Plc, began collecting in 1992.

“This is only the tip of the iceberg,” Gordon Eubanks, a tech entrepreneur, told Bloomberg. He spent more than $1.2 million on at least seven lots in Wednesday night’s sale, including the unique “Bible Block” of six 10-cent stamps from 1847, for $590,000. [Shown above.]