How much does this cost to the nearest dollar?

The String Butler V1 Lux (Black and Gold) - Best Guitar Upgrade to Improve Tuning Stability
The String Butler's patented design guides the 4 innermost strings though the nut using 4 low friction rollers. This reduces kinking and friction in the nut which in turn improves tuning stability. The V1 String Butler mounts to the guitar by simply replacing your Truss Rod Cover with this part using the existing cover mounting point and screws. Addresses frustrating tuning issues found on many guitars with a 3 + 3 headstock configuration. The String Butler’s Patented Design attaches to the head of your guitar and corrects the angle of the strings as they pass through the nut. This German designed, all metal, anodized and chrome plated, guitar accessory is assembled in Germany so you know

Price is $54.00
Price: $53.97