Yeah I know I have had my fair share of buying dud units off the bay but it's all about chance, this will be my 3rd one of these that I have had problems with 1st 2 had major issues, but this one which has not been used in years is squealing.
I asked the seller if I could open it up so I could have a look inside, had no picture at 1st the only thing I have done with it for now was clean the pinch roller it was filthy and the head drum. Just have a look at this video doesn't sound nice at all.
The thing is it doesn't do it all the time, though the sound keeps going as well now.
https://youtu.be/oCR-6a7yjEk