Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Temperatur: 150°C ~ 450°C, Max. 0.2mm for welding pen, Welding Pressure: 300 – 500 g, Welding Pin Range: 5 – 6 mm, Power: 1.5 KW (Instantaneous), Supply Voltage: AC 220 V ± 20 V/110V, Time of Eight Pulses: 8 ~ 80 ms (adjustable), Welding Distance: Adjustable, Power: 50 W, Electric leakage Switch Requirement: 60 A or more than 60 A, Current: 500 A, Time of Four Pulses: 2 ~ 20 ms (adjustable), Suitable Welding Thickness: 0.03 – 0.3 mm, Time of Double Pulse: 1 ~ 10 ms (adjustable), Output Voltage: 20 V DC
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($210.78): BG37ae98
2. ($245.43): BGPTL088
3. ($259.87): BGGines
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): BGHJA189, AFfbG10, 502C6B, BGTool15, BGVDay10%off, BGMPB2020, BGAFF10OFF, BGTT10, a56573, bGhOnEy10, BGherra, BGdragonBoat, BGSP08, bgshOOp10, BG534014, BgoFErTaSchInA10, BGELIG0920, BgcLuBofErtA10, BGWELDTOOL, 7bcdf9, BGCuponation10, BGHONEY2110, BG534014A, BGTR534014, BG960cbf, BG019b41, BG8a7644, CityadsTool, BG75ab48, BGTools8
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – SUNKKO 709A Spot Welder [EU/CZ] ($-3)
Price history and price alert
Here is price history (for all/most countries) for SUNKKO 709A Spot Welder.
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)).