As I don't want to sell my work through a merchant site, I use only e-mail contact or private message to provide prices.
Maybe annoying for you, but I like personal contact
It is really easy to have a catalog: a private message (the "letter" icon on the top-right of the page), I answer and you're done
Before the entire library (thankyou for your support), one single story will give you an idea of what I can do in storytelling for a rather moderate amount (this last remark doesn't include movies).