They are a noisy machine, resistance putting upright can be caused by the changeover assy valve area.
pull the handle back and pull up the changeover upwards then put the machine upright.
When fitting a new hose, use a spray of silcone lube on the long ali tube as it makes hell of a difference.
All them white scuffs will easy come off with a bit of isopropyl, or petrol on a small rag.
sole plate can be finely cleaned up re the sharp edges with a fine file and wire wool.
Sole plate locking screws are burred and require the stanley knife blade trimming the rough bits off.
Beater bar will require stripping, bearing removing and greasing.
fit a new pad post filter and pre filter if it's too far gone.
clean up and sell on whatever you can get for it.
If it's never had a motor replacement then it may not last long.
Good practical experience can be gained if you never done one before. And thats worth more than any small financial gain imo.
It's a basic machine
I avoid these machines tbh.