It's a silver flighter. Chrome trim. Steel nib. No nib code (as far as I know, but when I asked him to check the feed for a code, he said the "nib is blank" so... let's just assume the worst case scenario, it's a plain old round medium). Has been inked and used but cleaned after last use and has been sitting pretty and unused for a while. No scratches at all. Comes with converter. Picture:

I really don't know how to appraise pens and I offered $20 Canadian (which nowadays is pretty much $20 American) and he says he wants more. I'm not looking to rip anyone off, I just want to pay a price that is fair for both him and me.
Steering a bit away from the topic, how much would nibs cost me? I'm looking towards a medium italic but any italic or stub would do. This will help me determine what I'd have to pay on top of the pen to get exactly what I want.
Anyways, thanks for reading! I'll appreciate any help you can give me.