Greg from Greg and Pens demonstrates a great entry-level glass dip pen. They are easier to use than quills and fountain pens, but they have that cool scratch feel as they're drawn across the paper. They are available in sets with lots of gorgeous ink colors.
Here's illustrator Peter Draws showing what it's like. For those used to a responsive nib with a little give and pressure sensitive ink delivery, this can take some getting used to, but it can yield great results in the right hands.
Image: YouTube / Greg and Pens