Widescreen Yes /16: 9, Refresh Rate 60Hz, Color gamut 85% NTSC, Size 357X224X9.4mm, Touch Screen Support, Panel Type IPS, Brightness 350cd/m, Contrast Ratio 1000: 01: 00, Battery 10000mAh, Weight 800g, Resolution 2560x 1440, Model Alldocube Expand X, Screen 13.3 Inch.
Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
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. Only one coupon available!
Link: Banggood product page
1. ($263.99): 13f142
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 7d18f7, BGCuponation10
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for Alldocube Expand X 13.3Inch 2K Monitor. The lowest price was: $219.99.
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)).