I have just checked coupons. The lowest price I could get is 36.99 USD for RT-E910 Screen (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest price update (UTC time):
Banggood (36.99 USD)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Is it good price? Hmmm, price is higher than average (which is 27.49 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 36.99 USD
Aliexpress
Click here… to search for RT-E910 Screen Lamp on Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for RT-E910 Screen Lamp.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).