Output: AC100-240V 50/60Hz 10A Max, WIFI: IEEE 802.11 b/g/n 2.4GHz, Size: 42.6×42.6x20mm, Input: AC100-240V 50/60Hz 10A Max, Brand: Sonoff, Model: MINI, Material: PC V0.
Basically copy coupon, view price history or create e-mail price alert. What is the 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. Hmmm… There is no active coupon in Banggood at this moment.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): elec, BG12Mini, BG13mini, BG15Gadgets, SONOFF15, bGpAnDacHeCk, BGVDay10%off, BGMPB2020, bGhOnEy10, BGSMOFF, BGSOFMINI, BGSONOFF15, BGUKmini, BGELIG0920, 13f142, BgcLuBofErtA10, BGSONOFF16, BGAFF10OFF, BGSTHO15, BGCuponation10, BGHONEY2110, BGbee816, BGSHE15, BGa64ffb, BG3585aa, 6GSGIT, ADMITAD2212, Couponsde7, BGSmart6, 8BGwbg2204, 8wEbgaInS5, pROMo8cuPoN, BG15Sonoff, Cuponation9, BGd98439
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – SONOFF Mini Two Way Smart Switch Module 10A [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for SONOFF Mini Two Way Smart Switch Module 10A. The lowest price was: $7.49.
Price records source(s): Gearbest, 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)).