Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
Longer LK5 Pro Upgraded 3D Printer 90% Pre-Assembled Large Area with dual blower kit 4.3inch Color Touchscreen | $557.40 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Filament Detector Yes, Gross Weight 13.5KGS, Resume Printing Yes, Printer Dimension 580*540*663mm, Printing Speed ≦180mm/s (Suggest 60-80mm/s), Net Weight 12KGS, Printing Technology FDM, Connection TF Card or USB Cable, Extruder Single, Nozzle Diameter 0.4mm, Layer 0.1-0.4mm, Slice Software Cura / Reptier-Host, Printing Temperature 190-250℃, Package Dimension 662*588*193mm, Printing Material 1.75mm PLA/ABS/Wood, File Format G-code / stl, Printed Size 300*300*400mm (11.8″*11.8″*9.8″), MODEL LK5 PRO
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
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!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG6b183d, 13f142, BG6eec7e, BG807222
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for LONGER LK5 PRO FDM 3D Printer Kit.
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)).