$25.99 – Size 6.14 inch*2.17 inch*0.94 inch, Name Brake Fluid Tester, Test Range DOT3、 DOT4、DOT5.1, Model BF200, Color Gray and black, Battery 2 pcs AAAA batteries (not included), Material ABS, Temperature -10°C~50°C, Display High resolution screen.
$25.99 – that is current price with coupon for 12V Auto Brake Fluid Tester (in Banggood). You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
Latest coupon code price check (UTC time):
Banggood ($25.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? Isn’t it too expensive? Hmmm, price is higher than average (which is $19.66 right now), so better set price alert down below…
Link: Banggood product page
Price: $25.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGf475ef, BGSCM75, BGf6b5cc, BGSCM11, BG6aefd2, BGCRT313, BGAMMT03
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for 12V Auto Brake Fluid Tester. The lowest price was: $17.99.
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)).