Love the design. Is there a reason why you can't charge less than $20 a month? I was hoping to set up a small shop for a friend, but they'll probably only have

Love the design. Is there a reason why you can't charge less than $20 a month? I was hoping to set up a small shop for a friend, but they'll probably only have $80-$100 per month in revenue to start out with, so it would probably make more sense for them to go with an eBay store or something similar.