16.09 USD – that is current price with coupon for AVR USB (in Banggood). Just check coupons out (with price alert and history). Best price?
Latest price update (UTC time):
Banggood (16.09 USD)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. You probably want to know if this is a good price. Well, this price is higher than average price (8.99 USD)
Link: Banggood product page
Price: 16.09 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGd0b05d, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, 8Couponsde, MVC8SPRING, 8BGwbg2204, pROMo8cuPoN, BGJUNEGSG9, Cuponation9, 9OFFSUMMER, BG589b2e
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
Click here… to search for Geekcreit UNO R3 ATmega16U2 AVR USB Development Board on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Geekcreit UNO R3 ATmega16U2 AVR USB Development Board.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).