$6.39 – Diamter: 58mm/2.28in, Material: metal, Display: digital, Four kind of unit: PSI KPa Bar Kg/cm2, Product name: LCD Tire Pressure Gauge, Interior Battery: 2xCR2032, Measure scope: 0-200PSI, Main color: black, Fitment: universal for most vehicle;such as car /truck /van /motorcycle etc., Working temperate: -20°C to 80°C.
$6.39 – that is current price with coupon for 0-200Psi Digital LCD Tire Air Pressure Gauge (in Banggood). Just check coupons out (with price alert and history). You probably want to know what is the best price?
Latest coupon and price update (UTC):
Banggood ($6.39)
Banggood warehouse is located in China. I think you want to know if the price is good. Actually this is the best price in history according to CouponsFromChina database! There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Price without coupon: $7.99
1. ($6.39): BGb1acd8
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
This is the best price ever noted in my database!
Old coupons (from the oldest to the newest): BGSCM11, BGe8a594, BGc1ab77, BG599541, BG6bd1b4, BG16217e, BGeb34c8, BGCAR639, BGAMMT03, BGad2fc9, BGe5d8db, BGea768f, BG5c10a8, BG56a872
(you can check these old coupons out, but these probably won’t work)
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 0-200Psi Digital LCD Tire Air Pressure Gauge. The lowest price was: $6.39.
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)).