Nib: 0.4mm, Material: ABS, Product Model: RadicalGel 661/05, Quantity: 12 pieces.
Basically copy coupon, view price history or create e-mail price alert. Best price?
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.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. I have no active coupons for you right now. I don’t really know if this price is reasonable, coz there’s no price history in my DB.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 12annvex-8%, 7f09ac, e2bcea, BGMLSwiss, 2019SPEDM, BG3CSUM, AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, BGAFF10OFF, BGTT10, bGhOnEy10, BGRA582, BGRAX582, BGdragonBoat, BGSS10%SW, BG8868, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, BGES456, 13f142, BGHONEY2110
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – 12x Xiaomi Radical 0.4mm Swiss Gel Pen ($-3)
Price history and price alert
Well, you won’t see price history chart, coz we have only 1 database record for this item (and price was $6.99).
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)).