5. Primary Colors
Current ebay asking price: $150
The Primary Color mixing bowls are the quintessential Pyrex collectors item. They were first produced in the 1940s, but today they are still incredibly popular. Though there were some variations in sets, they were generally sold as a 4 quart yellow bowl, a 2 1/2 quart, green bowl, a 1 1/4 quart red bowl, and a 1 pint blue bowl. These days, it’s pretty easy to find individual bowls for sale at estate sales or thrift stores. Complete sets aren’t too hard to come by either, but prices vary widely depending on the age of the set.