350 S carburetor replacement

Since I’m still having problems with my float sticking, I am thinking about just replacing the entire carburetor. I’d like to know if anyone who may have had this same issue has done this and it fix the issue? Or would I just be wasting my money?

Has anyone ever had any issues buying new carbs online?

I have been looking on Ebay and have found some that are selling for cheap, like $70.

Any thoughts?