There has been a big resurgence of interest in vinyl over the past few years, leading to a lot of record players and turntables being taken out of storage, and put into use. Many give mediocre performance, if they work at all. Most have never been serviced. Grease drys up, rubber parts harden or perish, crystal cartridges absorb moisture and fail, capacitors can require replacement. However they can often be given a new lease of life and go on playing records for many years to come.
I service and repair many different seperates turntables, including of course the legendary Technics SL1210, which I have been dealing with for the past 30 years now. How time flies!