My 80 year young mum makes homemade greeting cards. A coworker and I got talking about hobbies and craft and I told her my mum makes cards and I told her what my interests were. She said she'd love to see my mum's cards. I emailed her a few and she said they're amazing and would like one made for her mum and then in the same email said, "But only if she charges me proper price for it". What does she mean by that?