Size: 32*30*12mm, Max height: 50000m, Max update rate: up to 10Hz, Max acceleration: 4G, Max speed: 515m/s, Weight: 20g, Positional accuracy: 50 centimeter precision when working with concurrent GNSS, Velocity precision: 0.1m/s, Item name: TS100 Mini M8N GPS.
Price history, coupons and price alert are available on this page. 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 price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($31.87): BGGAL8
2. ($31.87): BGJON8
3. ($31.87): BGRCParts8
4. ($31.87): 8Couponsde
5. ($31.87): MVC8SPRING
paste coupon code in your cart and click Apply 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): BGRTS100, TTxBG10, 0e7f33, FBCOUPON1, BGAFF10OFF, BGCuponation10, BGDAVIS, BGHONEY2110, Parts8, BGRACING1125, Tabby20, BG1efeb0
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for Radiolink TS100 RC GPS Module. The lowest price was: $18.
Price records source(s): Gearbest, 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)).