Research, research, research. These are tough times to be buying a used car — prices have gone way up, so be prepared for sticker shock — but even at the best of times, doing some hard-core homework is the only way you’ll be able to separate the flakes, charlatans, and lemons from the good ‘uns. You might get lucky and get a good tip or personal connection here, but you’ll “make your own good luck” if you also do your own digging.
Of course, you may already be doing that!
I went through this about a year ago when my beloved Camry finally died at 375K miles. Here are some of the online resources I found helpful:
basic how-to-shop advice:
https://www.nerdwallet.com/article/loans/auto-loans/buy-used-car
https://www.kiplinger.com/article/cars/t009-c000-s001-how-to-shop-for-a-used-car.html
https://cars.usnews.com/cars-trucks/how-to-buy-a-used-car
https://www.carfax.com/blog/car-buying-checklist
https://www.realcartips.com/cardealers/360-dealership-ratings-reviews.shtml
researching makes/models, getting an idea of going prices, finding leads to local dealers:
https://www.edmunds.com/
https://www.kbb.com/
https://www.nadaguides.com/
While shopping I made heavy use of the Carfax vehicle history report
(
https://www.carfax.com/vehicle-history-reports/).
This can tell you if the car has been in a major accident, had flood damage, or the like, and how well the previous owner kept up maintenance (important!), though it’s not 100% foolproof. Most reputable dealers will provide the Carfax for free (though you should double-check the VIN to make sure you’re seeing the right report). AFAIK very few individual sellers offer this, but if you have found a vehicle you’re 95% sure of, it would be worth investing the money to get your own. (You can do this online with a credit card as long as you have the VIN.)
Your state DMV will probably have a website where you can plug in the VIN to make sure the title doesn’t have a lien on it. I think (could be wrong) that a dealer has to tell you about a lien but a private seller doesn’t. I had one try to slide an encumbered? title by me — was very nonchalant, too, when I noticed it, the little rat. You certainly meet all kinds! It is worth checking this before you go to a lot of trouble to view a car. (Anyone who won't give you the VIN over the phone is not someone you want to buy from.)
There are other precautions you can take, too; those how-to articles cover a lot of them. And for sure get a good mechanic to check out the vehicle before you buy it. There are ways — including, but not only, the Better Business Bureau — to help you find a good one if you don't already have one. Between the mechanic and the Carfax you may pay $100–200, and nobody likes to pay that, but compared to spending thousands on a lemon! it’s worth it.
I have heard from several different mechanics that Toyota and Honda are the best bets for affordable but reliable high-mileage cars. Supposedly there is a Toyota truck out there that made it to a million miles.
Not a fun or easy task -- took me four months but I was happy with the result and I hope you find the right vehicle, too. Good luck!