Here’s a very nice piece about the iconic Parker “51” fountain pen from a woman who inherited one from her father. I don’t have a Parker “51” in my small collection, although they are apparently not too hard to come by. I never really got into buying vintage pens. There’s a whole website devoted to nothing but the Parker “51”, if you’re interested. Looks like you could pick up a decent one for $150-200 from that site.