I have just checked coupons. The lowest price I could get is $29.99 for SCULPFUN S9 / S6 Pro / S10 Air Assist Nozzle Kit (in Banggood). Just check coupons out (with price alert and history). Do you want to know what the best price is?
1× 2 meters air pipe, 1× Manual, 1× S9 Nozzle Kit, 1× Tool Kit
Latest price update (UTC time):
Banggood ($29.99)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Price? Well, this price is higher than average price ($29.03)
Link: Banggood product page
Price: $29.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): Cuponation9, BG8ReviTrage, BGcoupon8off, BG00c906, BG8OFFCOUPON, TTBLACK5, BG589b2e, BG8FORMULAMX
(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
Check out price history chart (for all/most countries) for SCULPFUN S9 / S6 Pro / S10 Air Assist Nozzle Kit.
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)).