I think unfortunately your girls are completely right when it comes to graphic design services on etsy, there are too many people that have set the bar to low
My father is a graphic artist and I hate to see things priced so low that I know the time and effort professionals would put into.
Pricing is frustrating on etsy. I am a firm believer that you get what you pay for. I just found a shop that has resin necklaces as low as $3.00....how could anything be made after etsy and paypal fees, that doesn't even factor in supplies. It's frustrating to see things like that because then it will make some people see $20 for a necklace as high. I personally spend a good amount of time on my pieces doing them in layers and finishing them after they are cured so my customers receive a quality piece.