in the bay area look for "broken" turntables. these are usually broken because of a
belt that went glue, too loose, unaligned around the various loop constraints, or
even missing.
I've bought a few for under $25 (and a couple for $10) and some are fixed for pennies
(the pioneer linear trackers have a second belt that lifts the arm that gets loose,
replacements are $4 but rubber bands work). full belts are about $10 on eBay.
same goes for Nakamichi cassette decks - there's an idler that gets worn and doesn't
drive the mechanism. a few bucks for a bunch that will last forever.
the bigger problem is the stylus (needle), some carts use ones that are out-of-production
even by third parties so a replacement can cost a few bucks. I'd look for P-mounts
since most folks look down their noses at them so they get no respect. I happen
to love them for their trackability.
do remember that golden age turntables are approaching 40-50 years old and
expecting no maintenance is unrealistic.
because of the bay area's decades-long wealth, there are so many places:
CL, SA, GW, thrift stores, church sales, flea markets, estate sales, electronics
reseller retail and warehouses, and above all - garage sales where they're
selling records - means somewhere in the back there's a turntable. I'd
go to the classical music offerings, because no one else shows up and
they take great care of LPs, and no one wants them. means cheap.