Same as Richard above, I bought a second hand OS3000 from Stewart of Reading when I was a teenager in the '80's. It served me well throughout my days of TV & video repair and then security/ Timelapse VCR servicing.
It is still serving me well in it's role of vintage TV repairs. I dare not think how many hours it's been on for just displaying a line! Traces are still bright and sharp- way better than my mate's Hameg!
You really cant go wrong for a tenner!
Cheers
Nick