When the clock strikes midnight on Halloween, the pre-owned side of the car business may been in for a treat.

Industry observers have released their expectations for used-car sales in October, calling for figures well above 3 million units.

TrueCar said used-car sales could approach 3.29 million units for the month, which would be a 10.5-percent year-over-year increase.

Edmunds.com is forecasting about 3.2 million used-car sales this month, which would translate to a 38.7 million SAAR. Those would be even with September figures, according to Edmunds.

Both Edmunds’ and TrueCar’s forecasts include sales from independent and franchised dealers plus private-party sales.

On a dealer level, the latest quarterly presentation from Cox Automotive chief economist Tom Webb — citing the National Automobile Dealers Association — predicts that franchised dealers will sell more than 15 million used units this year, while independents will sell more than 14 million.

Both of those figures would be up from 2015 and continue multi-year growth patterns.