I have just checked coupons. The lowest price I could get is 38.99 USD for FNIRSI WD-02 Metal Wall (in Banggood). Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Latest price update (UTC time):
Banggood (38.99 USD)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. Is it a low price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 32.39 USD)
Link: Banggood product page
Price: 38.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG20236Tool, BGbe8290, BGc43276
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
FNIRSI WD-01 Metal Detector Wall Scanner | 32.37 USD | Paste “05CD03 or CDPU03 or FRCD03 or CDES03 or CDEW03 or AE3ZNAFEU or USAFF3” (may not work) |
 |
FNIRSI WD-01 Metal Detector Wall Scanner | 33.81 USD | Paste “05CD03 or CDPU03 or FRCD03 or CDES03 or CDEW03 or AE3ZNAFEU or USAFF3” (may not work) |
 |
FNIRSI WD-02 Metal Wall Detector | 38.73 USD | Paste “05CD03 or CDPU03 or FRCD03 or CDES03 or CDEW03 or AE3ZNAFEU or USAFF3” (may not work) |
More on Aliexpress… Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for FNIRSI WD-02 Metal Wall Detector? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).