I have already setup and tuned this machine. It performs incredibly well and has a massive build volume. I just bought it in March, this year. My wife and I are downsizing to RV living, and I will not have any room for it.
Any exchange will be done in the Sherriff's parking lot near the fairgrounds.
The description from Amazon is below.
Here is the link.
LIGHTNING-FAST 500MM/S PRINTING: Powered by Klipper firmware, Neptune 4 Max reaches speeds up to 500mm/s (default 250mm/s) and 8000mm/s² acceleration. Ideal for use with rapid filament in high-speed mode
MASSIVE BUILD VOLUME: Spacious 16.53”x16.53”x18.89”/420x420x480mm build area for large models or multiple smaller prints. For high-temp filaments or prints over 300x300mm, bed clips are highly recommended to prevent bed shifting
PRECISION & QUALITY: Input shaping, pressure advance, and X/Y axis acceleration sensors ensure reduced vibration and enhanced printing accuracy for detailed, high-quality, fast prints
DIRECT DRIVE EXTRUDER: Self-developed direct drive extruder with 5.2:1 reduction ratio provides powerful extrusion and smooth filament feeding, with a metal throat and optimized air duct to minimize nozzle clogging
300°C HIGH-TEMP NOZZLE: The 60W ceramic heating element and extended hot end design ensure smooth extrusion for a wide range of filaments, including PLA, PETG, ABS, TPU, and nylon
EFFICIENT COOLING & EASY OPERATION: Powerful double-sided cooling fans and model cooling blower fans prevent warping and improve print quality. Connect via WIFI, U-disk, or LAN, and start printing with one-click file transfer