Up for your consideration is a sweet original Honda Express NC50 final rear drive gear with shaft and castle nut as shown.  It's off of a rare first-year 1977 model.  Teeth are very clean as shown, the shaft has very little wear and is relatively smooth.  Guaranteed great working condition.  

I'm happy to ship international at cost.  Free shipping to the continental USA! I've got a good amount of NC50 parts in my store so take a look.  Please note my handling time is slower than Amazon's.  I try to ship out ASAP but unfortunately I have to have a "real" job that sometimes makes my schedule erratic.  Thanks for looking!