How much does this cost to the nearest dollar?

Steam Knob for Rancilio Silvia Version 3
Steam Knob for Rancilio Silvia Version 3 Version 3 Replacement Steam Knob Replaces Steam Knob for Version 1 & 2 also. Version 3 knob has a new design Upgrade your old Silvia to the latest design Replace broken steam knob Brand Rancilio, Pieces 1, Handle Type Knob, Special Feature Easy to Install, Sturdy, Age Range (Description) Adult, Weight 2.08 ounces, Finish Type Polished, Unit Count 1 Count, Dimensions 4 x 2 x 2 inches, Manufacturer Rancilio, model number Version 3, Rank Tools & Home Improvement Range Replacement Knobs 799, Is Discontinued No, Available June 28, 

Price is $20.00

Price: $19.99