I love purple. It's my favorite color. I wish I had more purple fountain pens lol.
I currently own a TWSBI Diamond 580 AL in Violet, a Platinum Plasir in violet and the Pilot Metropolitan Violet Leopard. I used to have a Violet Pilot Custom 74 Demonstrator until I lost it...I'm planning to get that pen replaced within the next couple of months. I also know that a Violet Pilot Custom 92 Demonstrator exists. I saw that Pen on eBay a couple of months ago and I neglected to snatch that up when I saw it...I really want that pen (If anyone knows any information about it being sold somewhere please PM me ASAP, Thanks lol).
There's also a Sailor Pro Gear that comes in Blueberry and Purple that I know of. And I know that Pelikan is releasing the M205 in Amethyst soon.
Outside of custom made pens, anyone else know of other Purple/Violet Fountain pens?