$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.
According to my DB the lowest price is $25.99 for 12V Auto Brake Fluid Tester (in Banggood). Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Latest coupon code price check (UTC time):
Banggood ($25.99)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. You probably want to know if this is a good price. Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $19.66)
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
(probably won’t work, but you can try them out)
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)).