Seems like a good deal for some Wayfarer style Polarised Sunglasses. Might be good as a backup. Two models are available for $9.60 delivered - Cochise (linked) and Mono. There is another called Manhatten but that is $12.80 delivered.
I bought some Cochise matte sunglasses and they have good build quality and lenses seem good too.
Keep in mind that these are fairly small sunglasses by the looks of it and it might not suit larger faces.
Non polarised glasses also available at same or similar prices.
Website: www.liivevision.com
Posted via Express post by the way.
Edit: thought I would mention that these are cat 3 lenses which offers pretty good uv protection.
edit2: Cochise Matte is out of stock now - cochise torte, manhatten and mono still available.
I'd be curious if anyone with a big head has tried these? (Or have other suggestions?)
I find many sunglasses put kinda painful pressure on the sides of my largish noggin :)