When I was a kid, late 70’s early 80’s I used to stop by the DX gas station on the way to school and they had cardboard racks with cheap sunglasses. They were like $2. I was hard on them, so I was buying a set every week. They were basic wayfarer style frames with different colored lenses. You could get green, blue, black, yellow etc. One of my old ZZ Top concert T’s even had the green lens frames on the cartoon drawing. I know, I am rambling. I wish I could find these again. I search eBay but quickly grow tired of everything but what I am looking for.