I really like Noodler's Habanero, southwest sunset (formerly Apache sunset) is also a crowd favorite. I also enjoy Pilot Yu Yake and Diamine pumpkin.

I got my Lamy 2000 for about $100 on eBay iso you can sometimes find a deal on what is my favorite, same for both of my Pilot Vanishing Points. Alternatively, the Platinum Curidas goes for about $50.

The market for no-screw pens above a certain price point gets pretty slim from what I know. I imagine it's because many, if not most, pens are made from resin at a certain level.

Good luck!