In one of the most unusual used-vehicle selling years ever, dealers often have had to switch up the way they get inventory and — in some cases — throw out their valuation playbook altogether.

Used-vehicle sales were set for another strong year, but just a few months into 2020, the market was unexpectedly sent spiraling downward.

“Since the [coronavirus pandemic] hit back in March, April, it has really changed everything we know about the used-car market and the new-car market, for that matter, as well,” said Majd Saboura, Manheim’s senior director of offsite solutions.

When the pandemic shut down automaker plants in the spring, new-vehicle inventory became tight — and has remained so. New-vehicle inventories nationwide were down to 2.3 million vehicles as of August, according to figures from Cox Automotive, marking the lowest level since November 2011.

While automakers stopped making cars and trucks in March and April, consumers also were mostly staying home, and physical auctions reduced operations temporarily and went mostly digital. Wholesale vehicle values plummeted.

Then, as restrictions around the pandemic eased in May, customers returned to the market with pent-up demand.

With fewer trade-ins and vehicles in general, wholesale prices subsequently soared to record highs and, though they’ve cooled somewhat, they remained elevated into September.

Dealers have had to adapt.

Tony Duhon, owner of the New Orleans-based Premier Automotive group, said he turned all of his salespeople into car buyers, looking for deals on the street.

“So I’m getting them on Craigslist, I’m getting them on Facebook, I’m getting them on Instagram,” Duhon said of customer purchases, adding that he’s paying his salespeople incentives of $200 to $400 on good finds.

One salesperson in San Jose, Calif., bought 30 vehicles off the street in August, he said.

“A lot of what these salespeople are finding is when they go on Facebook and they promote themselves to buy cars, friends and friends of friends come in, and there’s a whole different trust factor,” Duhon said.

Duhon said he also switched from advertising deals on vehicles for sale and instead is letting consumers know that Premier Automotive will buy their cars and has a dedicated website — premierbuyscars.com.

The group has also become more aggressive with trading up in the service lane, tapping its database to let customers know that if they want to get out of their current vehicle, they’ll find low interest rates on their next purchase.

Duhon still has dedicated used-vehicle buyers focused on auctions, too. “But the problem is, they call me from the auction saying, ‘Boss, I wouldn’t buy that car with your money, much less mine,’ ” he said. “The price is too high.”

Bill Luke Chrysler-Jeep-Dodge-Ram, in Phoenix, has had to lower its margin target on used vehicles, President Don Luke said.

Until about six months ago it was selling new vehicles at a negative margin and making money on financing and accessories. Now it’s also selling many of its used vehicles at a negative margin, tacking on extended warranties where it can. The smaller margins on used vehicles has meant the stores have had to essentially retrain their inventory buyers.

“We had to literally reprogram these guys to buy the cars even though it was way over our metric, otherwise we wouldn’t have anything to sell,” he said.

At its main store, Luke has a wall where pricing is posted for hundreds of vehicle listings — it’s a guide for the buyers, telling them to aim below those values.

“And we kind of had to throw that out the window,” he said.

Used values appear to be slowly easing, however, so Luke is preparing to bring the guidance back.

At the same time, used-vehicle inventory is stabilizing. Cox Automotive said that, as of Sept. 14, total supply edged up to 2.23 million unsold used vehicles, from 2.20 million a month before and 2.12 million in the same week a year earlier.

But with a high selling rate, the average days’ supply of used vehicles stood at 37 in the middle of last month, compared with 48 days’ supply at the same time a year earlier. Days’ supply was in the 35 to 37 range for four weeks through mid-September after hovering in the 32 to 35 range since mid-June.

“The inventory situation for the used market is tight, but it is also stable,” Charlie Chesbrough, Cox Automotive senior economist, said in a report last month. “Days’ supply hasn’t changed much over the last two months, suggesting that selling rates and available inventory are changing at similar speeds.”

Casting wider nets for vehicles has helped some dealers.

Saboura, of Manheim, said even before the big shift to more online auctions, he has been “on a digital crusade,” telling dealers there “is a bigger world out there than just your local auction or trade-in.”

He’s known of dealers in Minnesota, for example, who have bought trucks in Arizona and Texas during the winter months. Such dealers could find the product at better rates than they would in their home market, and transportation costs ended up being a non-factor. “Especially if you’re saving a couple of grand on the vehicle itself,” Saboura said.

Still, such shopping should only be done after taking a hard look locally, he noted, for efficiency reasons. And of course, dealers should be familiar with their own inventory.

Saboura, who used to work in managing stock portfolios, draws on that experience and tells dealers to think of their inventory as assets under management: Every vehicle is a stock in the portfolio.

They need to be aware of which vehicles offer the highest ROI and which are depreciating quickly.

“So I think before you do any sourcing, you really have to look at your backyard and see what you have, and what are you selling versus not.”

Duhon, whose group has stores in Louisiana, Kansas, Missouri, California and Texas, said wherever dealers shop, they likely have to go beyond whichever channels they’re used to.

“When everyone’s fishing out of the same pond, you have to find a new pond,” he said. “And I think there’s a huge opportunity that we can learn from CarMax, because 50 percent of what CarMax sells, they buy off the street. So why can I not compete on the same level?”