Aliexpress
Click here… to search for MIXZA TOHAOLL 64GB U3 MicroSDHC on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (56.06 USD): BG1efeb0
Coupon (56.67 USD): Terence
Coupon (56.67 USD): 2203ActiesNL
(CouponsFromChina.com tip: this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Old coupons (from the oldest to the newest): AFfbG10, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10, BGELIG0920, BgcLuBofErtA10, BGCuponation10, 13f142, BGHONEY2110, BGd0b05d, ADMITAD2212, 2022ACTIESNL
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for MIXZA TOHAOLL 64GB U3 MicroSDHC is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).