Here's some more information:

I was never certain about why fuel economy was so bad.  I even replaced the
air mass meter (expensive part), but that was even worse.

It's possible that it was only so bad because I never really drove it on the
highway (city only), but since that's what I need a car for, the low
compression of the turbo engine just might not have been capable of
producing reasonable economy.

This car was our "good" car; the one we relied on most.  We bought a new
Hyundai to replace my wife's car (1986 Saab 900 that the auto trans blew out
on), and I bought the 740 I'm using now this past November because I just
got tired of trying to figure out what might be wrong with the 760.

The 760 has functioning air conditioning, newer Nivomat shocks, TONS of new
ignition parts (I spent a fortune trying to track down a hot start problem,
which turned out to be a faulty turbo over-pressure switch).  The leather
interior is mostly intact (one *small* tear in driver's seat).

I replaced the cylinder head and head gasket at about 180,000 miles.

I really am willing to consider any offer.