The referenced 85C on
ebay is a very nice used 3 cent Z grill from a reputable dealer. Price is pretty much in line with the market for these as well; maybe just a tad high. I actually considered this very stamp a few months ago when looking for an 85C. The same dealer also has another used 85C that has a pen cancel that is highly unusual in that it consists of two ruled horizontal parallel lines. I loved the clean look of that one but the grilled era seems a little late for pen cancels to me. Still, it is a beautiful stamp.