I have been researching and I cannot seem to find many reviews for the Sheaffer Sagaris, Prelude, or the Agio. Yes, I know, the Agio was discontinued a while back, but there are many people on Ebay that seem to have them NOS for around 30-40 dollars. They were supposedly super smooth writers according to some people. As for the Sagaris, not many people seem to talk about it much.
Mainly what I want to ask is: How does the Sheaffer Sagaris compare with the Agio, Prelude, and the 300? I have heard the 300 tends to have a little more feedback than the others. The others I have not ever heard being compared before.