In order to answer this question, it is important to consider the individual needs and interests of Greta. Depending on her age, lifestyle, and other factors, there are a variety of products that could be suitable for her. For example, if Greta is a young child or teenager, you could consider selling toys, books, school supplies, clothes or accessories. If she is an adult with hobbies or interests such as cooking or photography, you might sell kitchen gadgets and tools or camera equipment. Additionally, depending on the season and occasion you may have special items like holiday decorations or gifts for birthdays and anniversaries. Ultimately it will depend on what Greta needs and wants in order to determine what exactly can be sold to her.