ahahah oh dear. Price range?
decent workhorses <50 euro:
- Lamy safari/AL-star: ABS/Aluminum bodies, easily swappable nibs, available in a zillion colours. Proprietary cartridges/ converters
- Kaweco sport: available in plastic or a wide array of metals, uses mini converters or short cartridges
- Pilot Kakuno: Extremely well loved by everyone. the nibs have faces
- and if you like extra skinny nibs, a lot of the chinese brands like Majohn, Asvine, and Jinhao are actually a really good bang for your buck. they can range from a couple bucks to 75.
Slightly more pricy <100 euro: TWSBI eco seem to be loved for the 9023 different colours, but some people experience breakages
My most expensive pens are BENU, They're between 100-200 EURO, but I got them on sale.
And if you want a flex pen, the closest you're going to get in modern pens to a vintage wet noodle gold nib is a KANWRITE pen with an Ultraflex steel nib. they flex beautifully and they are DIRT CHEAP. Like 17 euro for a pen, My partner has
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with Fine Ultraflex nib and an ebonite feed and its delightful
As for the more expensive stuff, people love SAILOR and Pilot and Montblanc, though i cannot for the life of me understand why montblanc is so expensive. They're SO BORING. SAILOR has some feedback and apparrently feels more like a pencil lead instead of an FP nib. Pilot is well loved across the board. The fountain pen subreddit would probably answer your question much better than I can.