Gary Barbera, who sells Jeep, Ram, Dodge and Chrysler models in Philadelphia, said his sales team has to "dig a little deeper" to close a sale. Still, business is up more than 6 percent this month, he said.
The pace of auto sales for October is expected to be close to 17 million vehicles, according to the auto website Edmunds.
Jeremy Acevedo, Edmunds' manager of industry analysis, said the number might not be showing signs of weakness due to auto fleet sales. If automakers increase fleet sales to corporations and government agencies, it would offset weaker retail sales through dealerships.
For more than a year, analysts have said auto sales are primed to slow down for a variety of reasons, including a surge in 3-year-old models entering the used car market. That wave of pre-owned models with relatively low mileage gives potential buyers an attractive option at a far lower price. Still, auto sales have remained robust and are on pace to top 17 million vehicles for a fourth-straight year, which would be a record for the industry.
Dave Fischer, chairman and CEO of the Suburban Collection, which has more than 50 retail stores in Michigan, California and Florida, said if sales slowing around the country, he's not seeing it.
"We will be up over last year. People are still buying," he said.
—CNBC's Meghan Reeder contributed to this report.
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