When I was updating this page, then coupon price was $17.99 for KONNWEI KW310 OBD2 Car Diagnostic Scanner (in Banggood). Just check coupons out (with price alert and history). What is best price?
Material: Plastic, Brand: KONNWEI, Color: Black/Red, Product (cm): 11.6x 2.4x 8cm/4.5×0.9x3in, Model Number: KW310
Latest coupon code price check (UTC time):
Banggood ($17.99)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. Price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $13.74)
Link: Banggood product page
Price: $17.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGCNA15, BGCARELEC, BGHXM006, BGHXM014, BGHXM020, BGH7141801, BGAFF10OFF, BGCuponation10, BGHLimit50, BG10OFFAFF, BGHRepair2, BG10OFFAFF1, BG1ea513, BGd63ae6, BG612fbd, BGRepair63, ADMITAD2212, 2022ACTIESNL, Tabby20, BG1efeb0, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, BGAUTO22, BGdcbfa8, BG8ReviTrage, Cuponation9, BG12ff8d, BGSCM11, BG040f36, BG03ea66, 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
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for KONNWEI KW310 OBD2 Car Diagnostic Scanner.
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)).