That price for the whole unit is the same cost as just the replacement shield with anti-fog. I have three of them myself and keep a dedicated one for my plasma cutter, one for cutting the grass with a string trimmer, and the 3rd is my do it all, grinding, etc. Since they are back on sale, I now have a 4th. Thanks OP! You cost me more money...
Only complaint with it is when using hearing protection it must sit further up and forward than I would like, but it has saved me from getting whacked in the face more times than I can count.