Go down and check coupons out. Remember to check price history if it is available. What is best price?
Dotted lines: 2lines.Can set color& width& position, Interface: HDMI(Type A).USB(Type B).TF Card, Power consumption: MAX 0.15W 12V /0.12A, Cross lines: 8lines.Can set color& width& position, Can output with USB at the same time, Mirror: Horizontal vertical mirror, Optical format: 1/2.3 inch, Sensor P’anasonic: 41 MegaPixel / 21 million pixels CMOS, Scale mark lines: 2lines., Packaging size: 160*100*80mm, Sharpness Contrast Color gain: Support, AWB: WB color correction/Auto/Manual, Camera size: 74*74*35mm, Module: FHD216, Video resolution: 1080p@60FPS, Mono Negative: Support, HDMI resoltion: 1920*1080p 60FPS, TF card: MAX 64GB, Exposure: Auto/Manual.AE value can set, Gross weight: 400g, Net weight: 180g, Language: English/simplified Chinese, HDMI scale: Support 4: 3 /16: 9 /16: 10 screen, Image resolution: 41MegaPixel, R.G.B value setting independent, IR remoter: Support, Lens interface: C/CS口, Voltage in: DC 12V 55-21mm size, pixel size: 1.335μmx1.335μm, Can output with HDMI at the same time, USB2.0(Drive free): 1920*1080@30FPS 1280*720@30FPS 640*480@30FPS, Digital Zoom: Support
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now…
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 7d18f7, 13f142, BG632dd9, BG59d172, BG967d57, BGGines, BG388006, BG5737db, BG3df9eb, BGGRE888, BG7542ce
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for 3.5X 7X 45X 90X Double Boom Stand Zoom is here.
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)).