I have a Vintage straight edge razor that was my granfathers. How do I find out if its worth anything?

I have a vintage straight edge razor that ws my grandfathers I need to find out if its worth anything. It is called "Rattler" on ther yellow handle, the blade says "EL Toro" on one side and "Los Angeles Barbewrs & beauty Sup. Co. under that Germany. Can anyone help?