According to my DB the lowest price is $36.99 for 29m 153pcs Drip Irrigation Kit (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
1x Y Value, 10x 1/4″ End Cup, 20x Nylon Tape, 3x Lawn Sprinkler Stake, 10x Mist Nozzle, 1x Universal Faucet Connector, 10x Flat Tee Connectot, 2x Tube Connector, 1x Threaded Faucet Connector, 10x 1/4″ Single Barbed, 3x 360° Lawn Sprinkler, 1x Tape, 10x Adjustable Dripper, 10x 1/4″ Hose Connector, , 1x 29M 1/4″ PVC Tubing, 10x Flag Dripper, 10x Plant Label, 15x Tubing Stake, 1x Quick Connector, 25x 1/4″ Three-way Tee Connector
Latest price update (UTC time):
Banggood ($36.99)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. The question is – is it a good price? From what I can see this price is higher than average price ($12.13).
Link: Banggood product page
Price: $36.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGJL221, BGOCXP067, BGPONO12, BGDU1142, BGHUN061, BGHWGR6, BGDEXP11, 00c906, BGESDE231, BG00c906, BGAlerabat1, BG92f3e5, Terence, Tabby20, BG9df7e3, BG08d530, BG52c846, BGLMWPL3, BGLMW6, BGLMWCZ3, BGHome15off, BG0ffb96, 8Couponsde, MVC8SPRING, BG1a766e, BG6119e3, 8wEbgaInS5, BG0c1e6b, BG8da71d, BGb321c8, BG1c7eda, BGda9632, BGcoupon8off, BGGutscheine, BG8OFFCOUPON, TTBLACK5, BGdbe184, BG23ALEAprD, BG081591, BGc4a05f, BG8FORMULAMX, BGe734e7
(these coupons are old, so probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
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 29m 153pcs Drip Irrigation Kit.
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)).