No more listings until Sept, on vacation. My name is Skip Johnson, I have been collecting superb jumbo pre-1940 US stamps for the last 25 years. I will be selling them on ebay until they are gone. The US #720 featured in my logo was purchased in a plate block for $1.50. It received a 100J grading from PSE and sold it for $1000 in a June 2007 Shreves auction . I hope you get as lucky as I did!!!