According to my DB the lowest price is 56.87 USD for ESP32 SIM (in Banggood). You can create price alert here, copy coupons and view price history. What is the best price?
Latest coupon and price update (UTC):
Banggood (56.87 USD)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Is it cheap? Hmmm, price is higher than average (which is 38.49 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 56.87 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): Cuponation9, BG8ReviTrage, BG00c906, TTBLACK5, BG589b2e, BGSaleFeb8, BG8FORMULAMX
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
Click here… to search for T-A7608E-H ESP32 SIM LTE Network GPS Antenna ESP32-WROVER-E on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for T-A7608E-H ESP32 SIM LTE Network GPS Antenna ESP32-WROVER-E is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).