$80 is steep for a brush, but I have a buddy who runs a car detailing shop and he told me neck dusters actually save you money in the long run if you work with delicate paint. He says the soft fibers grab dust without scratching clear coats, so you don't end up having to do a full polish correction as often. That adds up fast when you're doing multiple cars a week. Do you find it cuts down on your finishing time at all?
My cousin got one last month and he's started dusting his car interior twice a week. He even texts me pictures of the dust bin like it's a trophy. It's a whole new kind of clean.