$18.99 – Upgrade REX-C100 Digital PID Temperature Controller Thermostat SSR output Max.40A SSR Relay K Thermocouple Probe High Quality.
You can get Upgrade REX-C100 Digital PID Temperature Controller Thermostat for $18.99 using coupon code (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon code price check (UTC time):
Banggood ($18.99)
Banggood warehouse is located in China. You probably want to know if this is a good price. This price is higher than average price ($10.32) for this item. Only one coupon available!
Link: Banggood product page
Price without coupon: $19.99
1. ($18.99): BGMAI666
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGTOOS729
(you can check these old coupons out, but these probably won’t work)
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for Upgrade REX-C100 Digital PID Temperature Controller Thermostat is here. The lowest price was: $7.99.
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)).