Current mood: buying this for $16.73 (coupon inside, obviously). Edge thickness: 2mm, Grip range: 1.0mm to 2.5mm, Material: Rubber, Width: 10mm, Length: 4m, Color: Black.
Updated:
Banggood
Warehouse in China.
Link: MATCC 4m Car Door Edge Protector Guards
Regular price: $18.18
$16.73 with coupon: BGCARAP2
$16.73 with coupon: BGCARAP1
Additional Banggood coupons:
1. First page
2. Second page
Aliexpress
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Price history and price alert
Here is price history (for all/most countries) for MATCC 4m Car Door Edge Protector Guards. The lowest price was: $7.99.
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)).