The TT 61 is a fine table, holds speed quite well. It's not quartz locked and when I was offered a TT 71 that was serviced at a good price I just couldn't resist. Otherwise I would have been happy with the TT 61 although I never use the pitch adjustment feature. Typical JVC build quality. I'm surprised it hasn't sold yet but it's little known in this country, I suspect it was only a Japanese model. The Japanese were notorious for keeping the really good stuff to themselves. LOL
JVC are probably the best DD tables when it comes to holding speed quartz locked or not. A lot of folks think Technics invented the quartz locked technology, far from it. JVC had a large engineering team and developed it. Being owned by the same parent company, Matsushita, Technics was free to borrow the technology.
It's the perfect drive unit for building a DD from scratch. Use your imagination to build a custom plinth and add your favorite tonearm. Fairly inexpensive path to a top notch turntable.
BillWojo