These are great cars if you can find one with a factory 5-speed manual (or perform a manual swap).
I had read about SC300's years before buying one and knew of their extremely close lineage to the fourth generation Toyota Supra sports cars and especially the much better equipped Toyota Soarers (same exact car except for the engine).
I got my chance a year ago when I found a higher mileage 5-speed model.
It only had one prior owner and had no accident history.
Save some expected cosmetic wear (replaced/fixed easily through parts channels/forums) and the need to do routine maintenance to a used car it has been an excellent drive and totally reliable.
Beautiful, TIMELESS styling.
I changed the front bumper to a factory Lexus '97+ bumper and now it looks like a real muscle coupe.
Rear wheel drive, 5-speed manual transmission, drivetrain and chassis being identical to the non-turbo '93-'98 Supra means anything that will mechanically work for that car will work on this one.
Inline six engine.
It's got enough power and torque to be a lot of fun to drive fast and aggressively.
Overbuilt and refined enough to behave when driven conservatively.
Of course, a turbocharger kit, 1JZGTE engine swap or 2JZGTE engine swap would really change things.
Then you'd have a real muscle car.
My car has more equipment than a standard 5-speed model:
Larger Supra Turbo wheels and tires, Bilstein aftermarket suspension, Supra Turbo rear sway bar, Turbo four-piston front calipers, Turbo leather seats and aftermarket clutch.
All of these things don't take away from the Lexus style but do everything to change the docile SC300 into a great aggressive handler with impressive stopping power.
Suggested improvements: all above modifications, plus the large brakes should have been standard from the factory.
15mpg/21-22mpg is the usual fuel economy but it is a 90's sports touring coupe, not an economy car.
Should have come from Lexus with the overseas 1JZGTE twin turbocharged I6.