Aliexpress
Click here… to search for XANES GD01 G301 532nm Green Laser on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
Coupon (11.00 USD): 4BLF
(CouponsFromChina.com tip: 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): bGhOnEy10, BGdragonBoat, BGAFF10OFF, BgoFErTaSchInA10, BgcLuBofErtA10, BG10OFFAFF, BGwhielabel
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for XANES GD01 G301 532nm Green Laser is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).