* Material: Plastic combs would have been cheaper than those made of metal, bone, or other materials.
* Quality: A simple, mass-produced comb would cost less than a higher-quality or designer comb.
* Retailer: Prices would differ between a department store, a drugstore, and a variety store like Woolworth's.
However, based on general price ranges and inflation calculators, a reasonable estimate for a simple plastic comb in 1960 would be in the range of $0.10 to $0.50. More elaborate or higher-quality combs could cost more.
You can use online inflation calculators to get a sense of what those amounts would be worth today.