Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (104.39 USD): bGhOnEy10
Coupon (106.99 USD): 7bcdf9
Coupon (106.99 USD): BGX9LP7
(CouponsFromChina.com tip: apply code in your basket (cart) 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): aff7off, BGX9LPW, BGX9LPKABA, BGss10%frs, BGPAYPALSS, BGX9LPJP, BGBCETX9PRO, BGX9LPWK, bgcelex9lp, BGX9LPN, BGGR98, BGfrsky10, BGADX9L, BG13X9LP, BGaDmITAd, BGBinKupon876, BGX10SYR, BGFRSKY15, BGX9LP98, BGX9LPE, BGX9LJP, BGX9LP30, BGX9LP95, 502C6B, BGBCETX9LPU, BG15X9LP, BGX9LP10, BGX9L13, BG10FrSky, BG11X9L, BGBFAFF2019, BGX9LPBF, BGX9LPWK11, BGCITYADS2019, BGX9LBF2, BGRCX9LP, BGX9LPa1, BGX9LUS, BGX9LPUS, BGX9LPUSA
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for FrSky&URUAV Taranis X9 Lite Pro RC Transmitter is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).