Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Distortion ≤10%, Receive Sensitivity 32Ω, bluetooth Version V5.0, Dimensions 495*88*57mm, Signal to Noise Ratio ≥70db, Volume Control Yes, Audio input AUX /USB /TF card /Bluetooth /FM play /PC mode, Model SH39, Type Basic version / Clock version / Light Version, Color Black, Battery Capacity 3600mah(Clock version and Light version), Microphone Yes, Speaker Function 6W*2, Brand SOAIY, Transmission Distance 33 feet (10m), Degree of Separation ≥60db, Way to Control Mechanical buttons, Speaker Impedance 4Ω*2, USB/TF Support 32 GB, Charging Input DC DCSV/1A-2A, Frequency Response 80-20kHz
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one coupon right now! Check this out.
Link: Banggood product page
1. ($59.49): BGAlerabatKL
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 13f142, BGd81cf1, BG7a3d75, BGJPSH39
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for SOAIY SH39 Gaming Bluetooth Soundbar.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).