Repair or replace my

I have a Rabco ST-8 straight arm turntable, marketed as a harmon/kardon when they were still a real audio co. It is, to say the least, not a youngster; I purchased it in 1978., but it has always worked well. It currently is sporting a Signet TK7e cartridge that was installed in 1982 (yes, 1982).It has a few creaks and groans, which probably means it needs a new belt, lubrication, and some alignment to the arm, and the very thin fixed RCA cables need replacing. The issue is should I spend the money to fix it up, and upgrade the cartridge, or just get a new TT?
The prices for new TT's seem totally outrageous, or perhaps I'm just showing my age and how out of touch I am with the current audio market.
Any thoughts or suggestions would be appreciated.
Also, any recommendations for a repair facility in the Los Angeles area?