Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
1x JST 1.25 2P, 2x PH2.54 PIN(1*12P), 1x T-Display-S3
Aliexpress
There’re some similar (or not) items on Aliexpress
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. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($11.99): BG724912
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): Cuponation9, BG8ReviTrage, BG589b2e
(probably won’t work, but you can try them out)
Price history and price alert
Do you need price history chart (for all/most countries) for LILYGO T-Display-S3 ESP32-S3 1.9 inch ST7789 LCD Display Development Board? There we go.
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)).