Aliexpress
Click here… to search for SunFounder Wireless Crawling Quadruped Robot Kit on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon right now! Check this out.
Link: Banggood product page
Coupon (150.71 USD): BGRobot1
(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): a1212, 502C6B, TTxBG10, affbg10, AFfbG10, BGSUNF15, BGBFAFF2019, BGBFCR14, 7bcdf9, BGMPB2020, bGhOnEy10, BGdragonBoat, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10, BGHONEY2110, BANGGOODSD, 6GSGIT
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for SunFounder Wireless Crawling Quadruped Robot Kit? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).