I picked up two Harris World Wide Collections locally. Like many WW lots, the stamps are in mixed condition and shown below are a few representative pages. Note there is some duplication since these came from two collections. The pages run from 1850 to around 2007, pages may or may not be complete. There are 50+ pages with a total of 1550+ stamps in this lot.
At around 2.5 cents per stamp this comes to $40.00 delivered to your door - free shipping to US only. (Willing to ship international and I will pay the first $6 in shipping, buyer pays balance.)