What to do with the old yaris?

[Tankeryanker]

I am replacing my 08 with a 2012.
I am in California, and I have to smog the 08 by April 2024.
Engine light is on showing misfire on all four cylinders. One mechanic thinks it's because it's burning oil. If it is burning oil, he will not do a rebuild on the motor. Spark plugs were changed awhile back, and one coil pack was preplaced. It could be injectors.

It has 280,000 on it and runs great. It still has good gas mileage and has never been wrecked. Only a small ding on the hood from a rock and cracked windshield from a rock. Paint has faded from the sun. Clean inside.

I hate to junk it. But without knowing why its throwing those codes....

Would you bother listing it or send it off to the junk yard? If so, what would be a fair price? I got a quote on a motor with 110,000 miles on it installed for $2,300-$2,400.

Thanks