Just check coupons out (with price alert and history). You probably want to know what is the best price?
Voltage 7.4V, Color Green/black （optional）, Size 130*60*20MM, Frequency stability 2.5ppm, Brand Baofeng, Weight 500g, Frequency 136-174/400-520MHz, Power 5W, Battery capacity 3800mAh, Communication type No card can be inserted, Model UV16 PLUS, Channels 128
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 code price check (UTC time):
Banggood
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG00c906, BGc1df91, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for BAOFENG UV16 PLUS 3800mAh Walkie Talkie.
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)).