You can often get an idea of the price something is achieving by looking for similar (or the same) items on ebay and watching to see how they end.
You can upload 4 images per posting - there's a bit to click on under
the box to the left of "Browse", which says "more images". This will give you another "browse" box.
To photograph signatures on glass, it often helps to rub a tiny bit of talcum powder over the mark and brush the remainder off before photographing.
If you have other things you'd like to show and discuss or have identified, please use a different thread for each item.
Floris Meydam is an important maker.