I've sold several hot roller sets. One was a Lady Schick which was the best seller at around 30 dollars.
Plug them in and see if they heat up and how long it takes. Use that information in your listing.
Clean the set well. I always take the rollers and wash them in the sink in hot sudsy water and state this in the listing.
Are the clips accounted for? This is important. A buyer would want to know about the clips and how many.
Do you have the box and/or any literature? If so, this will be a selling point.
Describe the condition of the casing, the cord, the rollers themselves, etc. Also describe the features of the set and the model and manufacture information that is usually on the bottom of the set.
In your listing title, use the words: "Hairsetter" and "Hot Rollers"
The gal who bought my Lady Schick set wrote me to tell me how thrilled she was to get it. She had used that particular set since they first came out and had sent hers to be fixed several times until there was no more fix to it! I got the impression this was a very well made and desirable brand.
Hope this information helps and that you do well when you list it!
I also sold a set of Lady Schick vintage curlers about six months ago. They sold for between $30-$40. All of the vintage ones were selling like hotcakes. Don't know why but they seem to sell better than the new ones. Be sure to use the word vintage is they are older ones.