Just wanted to add a little more pricing insight.
there is a seller who often has a bundle of 10,000 similar precancels for $200.00.
Alternatively, also on eBay
you can find US kiloware (off paper) which often will include many definitives of this series at a cost of $50.00 (give or take) with 5,000 to 20,000 stamps.
I'll let you do the math for a per stamp price.