$7.99 – 1 X bluetooth OBD-II Car Diagnostic Scanner.
I have checked all old coupons and price is $7.99 for iMars ELM327 Bluetooth Car OBD2 Scanner (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($7.99)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Is it a reasonable price for this item? Let’s see… Average price for this item is $8.33 and current one is $7.99, so it’s a good price!
Link: Banggood product page
Price: $7.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG10OFFAFF1, BGRepair63, BG00c906, ADMITAD2212, 2022ACTIESNL, BGeed3c3, MVC8SPRING, BG2f8d18, BGiMars2022, BGSCM11, BGCAR639, BGAMMT03
(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
Price history (for all/most countries) for iMars ELM327 Bluetooth Car OBD2 Scanner is here. The lowest price was: $6.99.
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)).