You can get KONNWEI KW310 OBD2 Car Diagnostic Scanner for $17.99 with coupon (from Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest coupon and price update (UTC):
Material: Plastic, Brand: KONNWEI, Color: Black/Red, Product (cm): 11.6x 2.4x 8cm/4.5×0.9x3in, Model Number: KW310
Banggood ($17.99)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Is it expensive? Hmmm, price is higher than average (which is $13.74 right now), so better set price alert down below…
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
(probably won’t work, but you can try them out)
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
Check out price history chart (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)).