A pretty good deal on the ELEGOO NEPTUNE 3 PLUS 3D printer.
Main Features:
●Larger printing size of 320x320x400mm.
●Stable printing with PLA, ABS, PETG, and flexible filaments like TPU.
●Dual-gear direct extruder for smooth filament feeding.
●49-point auto bed leveling for perfect first layers.
●PEI magnetic platform with special coating for adhesion and anti-warping.
●Dual synchronized lead screws and dual-motor drive for stability.
●4.3-inch removable capacitive touch screen for easy operation.
●Built-in print model preview function for real-time progress monitoring.
For $430 on Amazon I'd go Sovol SV06 Plus. Way better build quality, it's a Prusa clone. Slightly smaller build volume but still plenty big enough to do helmets.