$168.01 – DIDEEP X4000Pro 1L Scuba Diving Tank Snorkel Equipment Leisure Outdoor Swimming Spare Oxygen Portable Capacity Use 10-20 Minute with Adapter Diving Goggles Strap Bag – Black.
Latest update shows that DIDEEP X4000Pro 1L Scuba Diving Tank Equipment costs $168.01 (in Banggood). You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($168.01)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Good or bad price? Hmmm, price is higher than average (which is $159.87 right now), so better set price alert down below…
Link: Banggood product page
Price: $168.01
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGBFDAY8, BGSPRING8OFF, BGHONEYSP, BGESJY8, BGALL8, BGWATER5
(these coupons are old, so probably won’t work)
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.
Price history and price alert
Check out price history chart (for all/most countries) for DIDEEP X4000Pro 1L Scuba Diving Tank Equipment. The lowest price was: $96.04.
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)).