Language English / Chinese, Connectivity USB, Layer Thickness 0.1 ~ 0.4 mm, Heated Bed Temperature Up to 100 °C, Number of Nozzles 1, Off-Line Printing Available, Nozzle Diameter 0.4 mm, Printing Precision ± 0.1 mm, ABS, Build Volume 300x 300x 400 mm (11.8”x 11.8”x 15.7”), Detachable Magnetic Print Bed Available, PETG, Print Speed Up to 150 mm/s, Micro SD Card, Printing Softwares Cura, Nozzle Temperature Up to 260 °C, Repetier-Host, Display 12864 LCD, Filament Diameter 1.75 mm, Nozzle Travel Speed Up to 200 mm/s, Simplify3D, Power Outage Recover Available, Supported Materials PLA, Technology FDM / FFF.
Basically copy coupon, view price history or create e-mail price alert. What is the best price?
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.
Latest coupon code price check (UTC time):
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/i1u
Old coupons (from the oldest to the newest): Email5, 7d18f7, 13f142
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for TronHoo BESTGEE T300s 3D Printer. The lowest price was: $312.99.
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)).