1. Clothing & Accessories
2. Food
3. Cigarettes
4. Comic Books
5. Seeds

I feel this would be the right ranking as people today shop for clothes a lot more than food and hence people buy it a lot with bitcoins on amazon and ebay (with the help of amazon gift cards). Seeds would be the at the end as more than seeds, people buy electronics online and mobiles too. Even in the Marketplace on BCT, these goods get sold faster than other products.