You can create price alert here, copy coupons and view price history. Best price?
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):
1x e27 wifi light holder
Banggood
Banggood warehouse is located in Europe 
.
Link: Banggood product page
1. ($17.59): BGLED07
2. ($18.19): Cuponation9
3. ($18.79): BG00c906
paste coupon code in your cart and click Apply 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): 502C6B, DPT258, SFF879, TTxBG10, BGE27BULB, bgssaff9, AFfbG10, BGBFCR02, BGBFAFF2019, BGCITYADS2019, BGSFRFE, BGVDay10%off, BGLIGHT2020, bGhOnEy10, BGdragonBoat, BGSONOFF15, BgcLuBofErtA10, BGSONOFF16, 13f142, BGAFF10OFF, BGCuponation10, BGHONEY2110, BG10OFFAFF, BGwhielabel, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGLED2206, 9OFFSUMMER
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for SONOFF E27 LED Wifi Light Bulb [EU] is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. ![Price history for SONOFF E27 LED Wifi Light Bulb [EU]](https://couponsfromchina.com/pricehistory/History9588.png "SONOFF E27 LED Wifi Light Bulb [EU] price history")
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)).