$8.99 – The RP2040 microcontroller chip is designed by Raspberry Pi.
What is the best price for Raspberry PI RP2040-Zero Microcontroller Board PICO? I think it is $8.99 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood ($8.99)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). I think you want to know if the price is good. From what I can see this price is higher than average price ($7.96).
Link: Banggood product page
Price: $8.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): Cuponation9, BG00c906, BG589b2e
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
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 Raspberry PI RP2040-Zero Microcontroller Board PICO is here. The lowest price was: $4.7.
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)).