HUAWEI P40 Lite 6/128GB Global (Banggood, Aliexpress: OS: EMUI 10.1 (Based on Android 10), ROM: 128GB, RAM: 6GB, Card Extend: Yes, GPU: Mali-G52, support external NM card up to 256GB, NPU: Yes, CPU: HUAWEI Kirin 810 Octa-Core (2×Cortex-A76 2.27 GHz + 6×Cortex-A55 1.88 GHz) (the best price with coupon)).
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. There is one great coupon!
Link: Banggood product page
1. ($278.99): 13f142
this code has to be applied in your 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/feV
Old coupons (from the oldest to the newest): BGHP40L, BGHP40LS, Email5, BG8HP40L, bgshOOp10, BGCuponation10
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for HUAWEI P40 Lite 6/128GB Global is here. The lowest price was: $209.
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)).