How much does this cost to the nearest dollar?

Fiio AM5 High Power Headphone Amplifier for X7 Music Player, Titanium,Grey
Fiio X7 AM5 High Power Headphone Amplifier Module for X7 Music Player - TitaniumThe AM5 high-powered headphone amplifier module for the X7 high resolution music player utilizes the operational amplifier for voltage amplification. Together with the buffer, this amplifier module is capable of ultra-high current drive and ultra-low noise and distortion, along with high resolution and fine sonic detail retrieval. Separate positive and negative pole power supplies are provided, with two-level voltage regulation function corresponding to high and low gain modes, effectively reducing power consumption and increasing play time. Dimensions 0.98 x 2.52 x 0.63 inches, Weight 1.44 ounces, model number Headphone Amplifier

Price is $91.00

Price: $90.99