Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Main Material Steel + Plastic, Bearing 120KG, Seat Material Leather + Sponge + Wooden plate, Displayer Battery 1x AA Battery (Included), Travel of slide seat 670mm
Banggood
Banggood warehouse is located in Europe 
. Sorry, but there’s no price history in my database. I found coupon for you. Check this out.
Link: Banggood product page
1. ($228.79): BG8fcd54
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG8ec602
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Not enough data to show price history chart… $149.99 is the only recorded price. It was not cheaper than that since we have saved it in DB.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).