Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – CMSBIKE CMSBS-20 20 Inch Folding Bike [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
Coupon (475.19 USD): BG10OFFAFF1
(CouponsFromChina.com tip: just apply this code in your 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): BGBIKEL1, BGAFF10OFF, BgoFErTaSchInA10, 7bcdf9, BgcLuBofErtA10, BGHONEY2110, BG10OFFAFF, BGwhielabel
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – CMSBIKE CMSBS-20 20 Inch Folding Bike [EU] (-3 USD)
Price history and price alert
Check out price history chart (for all/most countries) for CMSBIKE CMSBS-20 20 Inch Folding Bike.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).