How much does this cost to the nearest dollar?

S.M.S.L SA400 High Resolution Power Amplifier, 2 Digital Power Amp Chips Class D 230W RMS x 2(4Ω), Bluetooth 5.0 APTX/XLR/RCA Input (with Remote Control)
230W RMS x 2 (4 ohms, 20 Hz - 20 kHz, 0.003% THD), Built-in power supply, easy to drive most speakers, (For passive speakers only, not the powered speakers). SA400 has add the screen brightness adjustment function and the countdown screen off function, The brightness can be lowered in the dark, so that the screen display will not be dazzling, and you can adjust 5-60s to automatically turn off the screen without any operation. Amplifier uses a solution of a digital

Price is $660.00
Price: $659.99