Should I retire my Harmon/Kardon T60?

As long as it works fine and the bearing is lubed I'd say put it on a good platform with a nice cartridge suited to the HK arm and enjoy. You'd probably be looking at a Rega P3 to better the Harmon Kardon. And very few decks have an auto lift at the end of the record.....

keep it spinning. its better than the rega 3,5 and 25

No....
i buy and sell turntables on ebay all the time....
put the t60 on a stable concrete..marble or granite surface, get a good cartridge...i just got a wooden grado the cheapest wooden model...
the sound is fantastic...in 3 years of trading turntables,this has been the best bargain and i use it more than my michell gyrodec...
a real piece of 1980s quality...a real underated classic.

Thanks for the responses.
Recently, I brought my T60 to a local Manhattan hi/fi shop for a "tune up" at Harmon Kardon's suggestion.
Although the unit sounds great, I wasn't surprised that the salesman attempted to sell me a VPI Scout, Scoutmaster or Superscoutmaster.
Assuming I keep my existing Arcam FMJ electronics (which contains a phono card) and my Grado Platinum cartridge,
are these VPI machines that much better?

Some time back in the year 2000 I was thinking about retirement for my HK-T60. I too was introduced to VPI turntables at that time.

I found the Nottingham Hyperspace to be the better turntable.

However, I still have my HK-T60 and it is in very good working order.
I have yet to find turntable that can play the Tchaikovsky "1812" Overture (Telearc)

Try an find a way to keep your HK-T60 you just my miss it in 5 (five) or so years, myself
It is all about the music.