I "sold" my '91 CRX HF (great gas mileage) to a friend who needed a car. I sold it because I got 2 more cars lined up that were larger, and therefore hopefully safer in case of an accident.

Well after having not getting paid for that car ($1500, a great deal, even then), putting $4,000+ into a POS Tempo in about 4 years, spending $1200 on my Mazda, Another $500 or so in repairs to it, $400 on a wagon, $250 or so on repairs to it, $800 on a RX-7, $1500 on my Datsun, $600+ on repairs to it, $600 on the Buick, another $600 in tires and repairs to it, along with gas for about 20,000 miles a year for 4 years since.....how much do you THINK I regret getting rid of that car?!!!

No, certainly that car might not have lasted me another 4 years. But without knowing...oh yeah, I regret getting rid of it. Though I have enjoyed driving some of my cars, so all was not a waste.