$12.96 – 40×60 Monocular HD Optic BAK4 Telescope (Banggood, Aliexpress: Magnification 40x, Please Note Tripod is not Included(You need to buy it separately）, Objective lens diameter 60mm / 2.36inch, Field of view 1500m / 9500m, Eye lens diameter 16mm / 0.63inch, Monocular size 144x 80mm / 5.67x 3.15inch, Field of view 7 degrees, Prism system Roof, Lens material FMC green film, Color Black, Weight 343g (the best price with coupon)).
According to my DB the lowest price is $12.96 for 40×60 Monocular HD Optic BAK4 Telescope (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Best price?
Latest coupon and price update (UTC):
Banggood ($12.96)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Good or bad price? Let’s see… Average price for this item is $16.16 and current one is $12.96, so it’s a good price!
Link: Banggood product page
Price: $12.96
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BG589b2e, BG1fb9fe, Sports23q1, BGdfe961, BG76719c
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
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
Here is price history (for all/most countries) for 40×60 Monocular HD Optic BAK4 Telescope. The lowest price was: $12.85.
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)).