I also have a 1928B $10 bill - Federal reserve bank of chicago signed by N.O. Woods and A.W. Mellon. There are three fold marks still visible and the corners are a bit dog-eared. There's a big G in the middle of the seal and the serial numbers are green. The number 7 appears in four corners of the middle scroll. L40 appears in the lower right of the middle scroll and the number 198s appears in the lower right corner on the reverse of the bill. It is relatively clean and not well worn. Can you give me an idea of what it might be worth to a collector or on eBay? Thanks very much.