Skimming through, did not see anyone mention this yet.
You are an ideal candidate for NO CAR. Your vehicle is in prime condition, and you should get great dollar value for it.
Is there anyway to car share? use a neighbors car one day a week? Enterprise car rental picks you up and they tend to be in most small cities around CA for rental insurance and car repair clients. renting one day per week x 4 weeks is only about $200.
Is transit (partial) a possibility for any part of the commute? Car pooling where you bike to where you get picked up?
What about an electric bike, or a scooter? I assume you have highway travel, but maybe not?
that's $200/mo + gas + insurance, or $78/mo currently...
$200 includes insurance, heck zipcar is all in for only what, $60 per day ( high because they want you to return car in 4 hrs).. Okay, I just looked it up, car rental plus insurance and tax at ca small city, not at airport is $43, per day(intermediate car). Need 1 gallon of gas for 24 miles round trip.... $48 per trip * 3 per month plus 15% for 6 more rental days per year...$175 per month..
Don't forget about depreciation/ value tied up in the tundra, and maintenance at $1000 per year on a 10 y.o. vehicle for battery, tires, shocks, brakes, timing belt, and those occasional large repairs. That puts him well over $200 per month on a gas guzzler.
What it boils down to is ease of renting, how much one wants a car always there, how much one wants to ramp up cycling on days off, and how much you just like the vehicle. If it is a pain, and you will buy a new one in a year or two, then put a high price on it, and try to sell it while you dont need to.
Driving three days a month and no kids or others to ramp up the risk of emergency need, for a car, this is one of the few cases where a car could be optional.