2m Mi Robot Vacuum Invisible Wall Tape [EU] (Banggood, Aliexpress: Type: Robot Anticollision Magnetic Tape, Product size (Lx Wx H): 200x 2.5x 0.21cm, Package weight: 399g (the best price with coupon)).
You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
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 code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. I can’t tell you if this price is good – not enough records in my database, so I won’t judge.
Link: Banggood product page
1. ($9.56): BGHOMEA13
2. ($9.89): BGTT10
3. ($9.89): bGhOnEy10
4. ($10.22): BGAFF7OFF
5. ($10.22): BGHOMEAPP13
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGBFCR02, BGBFAFF2019, BGCITYADS2019, aff7off, 2020CNY, BGVDay10%off, BGHOMEAPP, BGSS10%SW, BGXMRVC, BGHOMEAPP12, BGHome15%, 13f142, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD, 00c906, BG00c906, ADMITAD2212, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – 2m Mi Robot Vacuum Invisible Wall Tape ($-3)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $8.99.
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)).