$24.99 – It is powered by 2x AAA battery (not included), 1pc handle, 3pcs Phillips bits (Ph000, Ph0, Ph2), 3pcs Slotted bits (1.0mm, 2.0mm, 3.0mm), 3pcs Torx bits (T5, T6, T8), 3pcs Pentalobe bits (0.8, 1.2, 1.5), 2pcs Hexagon bits (H2.5, H3.0), 1pc Square Head bit (SQ0), 1pc Triangle bit (3.0), 1pc Tri-wing bits (Y2.5) and 1pc U type bit (U3.0).
You can get Xiaomi Wowstick 19 in 1 Kit for $24.99 using coupon code (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($24.99)
Banggood warehouse is located in China. I have no active coupons for you right now. Isn’t it too expensive? This price is higher than average price ($15.49) for this item.
Link: Banggood product page
Price: $24.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGCGHD001, BG589b2e, BG20236Tool, BGPT07
(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
Here is price history (for all/most countries) for Xiaomi Wowstick 19 in 1 Kit. The lowest price was: $14.99.
Price records source(s): Gearbest, 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)).