Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
0.91 inch OLED screen, Supports 2pcs 18650 batteries (not included), Thread: 510, Max output current: 35A, Max output voltage: 9V, Resistance range: 0.1 – 3 ohm, Wattage range: 7 – 120W
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Price history and price alert
Do you need price history chart (for all/most countries) for Teslacigs Nano 120W Box Mod? There we go.
Price records source(s): Gearbest
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)).