Aliexpress
Click here… to search for 3 Gear Adjustable Bar Sit-Ups Assistant Bracket on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (27.62 USD): BG8ReviTrage
Coupon (27.62 USD): BGcoupon8off
(CouponsFromChina.com tip: apply it 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): BG10OFFAFF1, BG4d9120, BG8ec602, BG8fcd54, 2022ACTIESNL, BGFitness, BGFT666, Cuponation9
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for 3 Gear Adjustable Bar Sit-Ups Assistant Bracket.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).