No-load Speed 10800r/min, Cutting Depth 45mm, Power Supply Suitable for Makita 18V Battery (Not Included), Item Name Electric Circular Saw, Plate Diameter 20mm, Saw Blade(Not Included) Diameter 125mm, Color Blue and Black.
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.
Updated:
Banggood
Warehouse in Europe 
.
Link: Electric Circular Saw 125mm For Makita 18V [EU]
$39.99 with coupon: BGb48356
Additional Banggood coupons:
1. First page
2. Second page
Price history and price alert
It’s a new item in our database, so I can’t create price history chart. We have saved this price in database: $25.99.
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)).