Scott #13 10ct Type I Used, Red/Black Cancels, RARE. All 10ct Type I, both perfed and imperf, come from the bottom row of the sheet, and all have one or two guide dots in the lower left corner margin. This one has two dots easily seen on the detail scan, as well as complete bottom of the right shell. My store has numerous very nice US classic stamps, including some of the rarest, and I add new ones all the time. George K’s Stamps. For clear, beautiful pictures of all the US and UK classics, go to his award-winning site. For a more accurate assessment of current value based on the total range of grades, see the PSE (Professional Stamp Experts) pricing guide, which is updated quarterly. Their cert grading also considers other factors than just centering, such as shade, impression, eye appeal, the back, perfs, faults, etc. But it will give you a better idea of the range of retail values in the US Classics arena. Stamp Collectors Against Dodgy Sellers. (see below) Here is part of the story, published on-line at MSNBC. Com. The item “USA Scott #13 10ct Type I Used Red/Black Cancels RARE CV $1,000″ is in sale since Friday, December 21, 2018. This item is in the category “Stamps\United States\19th Century\ Used”. The seller is “geokster” and is located in Atlanta, Georgia. This item can be shipped worldwide.