Check the listing for details. Electro Harmonix Deluxe Big Muff PI. Condition: Used. Listed at 499.99 USD. This Electro-Harmonix Deluxe Big Muff PI is a must-have for any electric guitar player looking for a high-quality fuzz effect. Made in the United States, this unit is built to last and offers a unique sound that is sure to enhance any musical piece. With a brand name like Electro-Harmonix, you can trust that this fuzz pedal is top of the line. This unit comes equipped with all the necessary features to achieve that perfect sound. It is easy to use and can be incorporated into any set-up, making it a versatile addition to any pedal board. Whether you are a beginner or an experienced player, this fuzz pedal is sure to impress. Light turns on but don’t have the equipment to test. One button missing but can still turn knob easily. Only vintage one online and rarely come up for sale.