The posts and tip screws will be the key to this. Clean them well and it will probably work good.
I keep Weller guns for my own use, the light duty 100 watt model and the heavy duty 200 watt models both. I use them several times a week on average.
When you get into it there is always something broken that could work again, if you make a good solder joint.
Just yesterday I had a broken chainsaw part I didn't want to spend the 25 dollars for a replacement, (I bought the whole saw for 5 bucks at a yard sale! 25 dollars for a little part, as if!) so I repaired the old part.
I was afraid the screws would vibrate loose on a chainsaw so I cleaned and soldered them tight.
Seems I am always soldering something or other.
I have to take the tip nuts all the way off and clean them every 3 years.
Generally though, twice a year, I just loosen the nuts and crank them down again, and get a fresh bite on the tip.
Uncorroded contact is the key. When its clean you get high heat quickly.
yours Scott