As many here know, my fuel sensor died within the first year of ownership.
The float dissolved into a translucent blob which I removed.
I'm sure different people have different ideas about these things but quite frankly, I found the flashing fuel level light to be an annoyance as it would start flashing when I still had almost a half of a tank of fuel.
Anyway, after three years of doing without the pesky thing, my bike is running great. It's never run out of fuel and I don't miss having the thing.
Good luck on your sale.