Glass Fishing Floats - About what is it worth?

by Cecilia
(Shoreline, WA USA)

I have a blue ball glass fishing float with the marking of 1 on the bottom.

I was wandering if you could tell me what it is worth?

I have a green on without any mark, but it has an inny bottom (like an inny belly button) and I haven't seen to many of them.

Is that worth anything? Or is that a normal one?

Thank you for your time.