So at my school (well, former school now) seniors are allowed to take the final month of the year to pursue whatever project they like as long as it's legitimate and you're learning something. So I chose to take 4 themes (Light, Lines, Liquid, and Motion) and do a series of photos based on them. A few days after the presentation, at our grad night, a parent approached me and told me they like my photos, so much so that they wanted to buy some of them. I've never sold a picture before, and I feel bad charging her for it in the first place because I know her, but she was adamant about doing this formally. So I was wondering how you all come up with prices for your work, and also how to sign your photos (they will be on glossy photo paper)? The reason for the asap is because I want to contact her as soon as possible, and be ready to do business since she was nice enough to pay me the respect to want to do this. So thanks in advance.