I want to order my first Chinese pen from ebay. I don't want to pay more than $10 including shipping. I want a medium nib that writes like a Pilot Varsity but is more aesthetically interesting. The pen should weigh about the same as a Varsity (32 g?), and it should take both cartridges and a standard ink converter. Not a proprietary converter and nothing that would be potentially messy! I've been drooling over Jinghaos, but then I saw these Bookworms.