Chemo Caps

My family and I participate in the ACS's "Relay for Life" event every year, this will be our 8th year!  My mom started sewing these caps first, so I decided to help her make some more.  When you do Relay for Life, you have to have an "onsite fundraiser", we will be having a few this year and selling these caps will be one of them.  I dont know what price my mom was thinking.  Maybe some of you can help me come up with a price range?   

Side view, I added a silk flower pin.

The cap is double sided.  The inside is a jersey knit fabric, soft for your head.