As rare as a shiny Pokémon: $29.99 (Banggood). Noise ≦25db, Material Aluminum, Product Size 185*80*215mm, CFM 180-220, Speed 1400rpm, WorK temp. 50℃-350℃, Net Weight 550g, Blade 6-blades, Color Black.
Updated:
Banggood
Warehouse in China.
Link: 6 Blade Wood Burner Fireplace Stove Fan
Price: $29.99
Additional Banggood coupons:
1. First page
2. Second page
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
Do you need price history chart (for all/most countries) for 6 Blade Wood Burner Fireplace Stove Fan? There we go. The lowest price was: $25.04.
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)).