Lamy safari
Kweco sport
Pilot metropolitan
Those are all 20 bucks or so and are refillable
Platinum preppy's are not refillable but were my first fountain pen, can be had in many ink colors, and are about 5 bucks.
Platinum preppy's are not refillable but were my first fountain pen, can be had in many ink colors, and are about 5 bucks.