3000mAh / Dual Circuit Protection Battery / 4.0ml / Top Filling / ECL 0.18 ohm / EC 0.3 ohm / 0.5 ohm Coil Head Clearomizer.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
2pcs/lot Eleaf IJUST ECM Tank Glass Extended Tube Fat Boy Convex Replacement Bulb Bubble Tubes | $2.44 | – |
Click here to search by yourself. Here are coupons that you can use.
Updated:
Price history and price alert
Price history (for all/most countries) for Eleaf iJust S Ecig is here. The lowest price was: $19.99.
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)).