I have checked all old coupons and price is $36.99 for 100W 110mm 2000mAh Rechargeable Polisher (in Banggood). Price history, coupons and price alert are available on this page. What is the best price?
Throw Disc Speed 2250 Rpm, Maximum Power 100W, Motor Speed 18000 Rpm, Power Supply Bring Your Own Lithium Battery, Throw Disc Size 110mm, Battery Capacity 2000mAh, Work Discharge Time 1-2 Hours
Latest price update (UTC time):
Banggood ($36.99)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. You probably want to know if this is a good price. This price is higher than average price ($31.44) for this item.
Link: Banggood product page
Price: $36.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGPHOOL8, BGGines, BGHPT15, BG589b2e, BG20236Tool, BGPT07, BG8FORMULAMX
(these coupons are old, so probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for 100W 110mm 2000mAh Rechargeable Polisher? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
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)).