https://www.amazon.com/YIHUA-Soldering-Conversion-Temperatur...
Do they probably work most of the time? Sure. But I want the temperature display to mean 500C when it reads 500C and not 450C, and for my iron to be up to temperature just as quick as my FX-888D does without being a fire hazard or potentially let out the magic smoke because some cheap component died.
That said, if anybody is looking for a hot air station don’t buy from Hakko - they’re current models are overpriced and take forever to heat up. Atten (a Chinese brand) sells fantastic stations in the $250 price point that heat faster and have a saner interfaces. Point I’m trying to make here is don’t spend money for a well known brand if you don’t have to, but make sure whatever you buy is equipment you can trust instead and that means having reviews from trusted sources outside of Amazon customers.
As someone with direct experience in this whole class of hardware (hobbyist grade UAS stuff), you're going to want to have a soldering setup and low cost consumables (heat shrink tubing, etc, extra connectors that cost a few dollars each) to have your own capability to do things like change out DC power connectors. It's totally normal to get a battery with a connector that you might not want.
If you stay in the hobby for the long run it will cost you a lot less money to have the capability to buy discrete parts and repair things yourself (example: buying a new $40 4-in-1 ESC) than buying bind and fly stuff.