This was my first soldering iron, it cost 1.60€:
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The temperature dial is fake, it has no active regulation. It just sets a fixed wattage for the iron and continues pumping heat into the tip until it burns through. After destroying a couple of tips this way (they're dirt cheap, thankfully), I came up with a method that actually makes this usable: Set it to 200C in standby, and 30 seconds before you solder a joint, set it to 450C, then immediately set it back to 200C. I recapped my first PSU and motherboard with this iron, even bought a second one to use them together as ghetto SMD tweezers. But one day, disaster struck - I wasn't careful enough with the temperature and it lifted the pads on a graphics card. Realizing the potential for damage, this was the day I retired it.
I then decided to splurge and spent 25€ on this T85 USB iron:
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First impression wasn't too great, its temperature was off by a whole 85C - hence the name T85, probably. Thankfully, it has a configurable temperature offset in the menu to correct this. The cartridge-style tips and temperature control were a massive upgrade. One problem is that there are no good quality replacement tips available. The ones I bought were a scam, they look different (tip is slightly darker), solder doesn't stick to them at all and the heat conduction is terrible. I had to keep using the original chisel tip which is quite small, so I always need to preheat the area when desoldering larger components. Wouldn't buy this iron again because of the tip situation, but it still works fine for the little soldering I do, so I never felt the need to upgrade it.
And this is my "mythtiger Professional Heat Gun" (12€):
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This thing is hilarious because it didn't work at all when I first tried it. It has two air speed settings, and at the lower speed, the airflow is so weak that the heating element keeps overheating and shuts itself off. Took me a while to figure this out. It also has no label on the temperature dial, so you have to memorize which setting corresponds to a temperature. I originally bought this to preheat boards, but it worked surprisingly well for replacing SMD components and memory chips.
For desoldering, I can't recommend this enough (low-melt solder paste):
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Makes it easy to desolder through-hole components with just braid or hot air instead of a desoldering gun.