Xiaomi YEELIGHT YLDPl8YL E27 LED Bulb 5W (Banggood, Aliexpress: Product material: PC + aluminum, Executive standard: GB24906, Working voltage: AC220V-240V 50/60Hz, Rated power: 5W 7W 9W, GB30255, Color temperature: 6500K cool white light, Lamp interface: E27, GB/T17743, Color rendering index: greater than 80 (the best price with coupon)).
Just check coupons out (with price alert and history). What is best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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.
Link: Banggood product page
1. ($3.70): BGYEE20COUPON
2. ($3.70): BgcLuBofErtA10
3. ($3.70): BGAFF10OFF
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): TTxBG10, aff7off, BGYLDFB, 2019SPEDM, bgssaff9, AFfbG10, bgbulb234, BGYEE11COU, BGLIGHT2020, BGYEBWCN, BGdragonBoat, BGLIGHT0920, BgoFErTaSchInA10, BGELIG0920
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Xiaomi YEELIGHT YLDP20YL E27 LED Bulb 9W ($-3)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi YEELIGHT YLDPl8YL E27 LED Bulb 5W. The lowest price was: $1.99.
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)).