Scott #28A 5ct Type I Dark Indian Red Used Weiss Cert RARE, reperfed at bottom, small thin at upper right and expert repair at bottom. I've dipped it in fluid several times and don't see either one, but Weiss had eagle eyes. My store has numerous very nice US classic stamps, including some of the rarest, and I add new ones all the time.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. The item "USA Scott #28A 5ct Type I Dark Indian Red Used Weiss Cert RARE CV $3,500" is in sale since Thursday, February 08, 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.