While beating year-ago numbers, used vehicles didn’t fetch as much money in the wholesale market during July as they did in June.

And while the year-over-year decline in July’s retail used-car sales played a role in pushing down these wholesale prices, another factor affecting used values appears to a positive for dealers.

In his latest monthly report to explain wholesale price changes, ADESA Analytical Services chief economist Tom Kontos said that there was an increase in the number off-lease and off-rental units flowing into upstream and physical auction channels.

That, plus additional trade-ins sparked by strong new-car sales, led to a boost in supply. And that’s not all, Kontos said.

“Growing auction inventories are also exerting downward pressure on wholesale prices,” he said in the Kontos Kommentary report released this week.

All told, July wholesale prices came in at an average of $9,743, according to the analysis from ADESA Analytical Services. This marked a 2.2-percent decrease from June and a 3.3-percent rise from July 2013.

All but one segment — mid/full-size CUVs, whose prices were static — saw a month-over-month decrease in wholesale values.

“Minivans and mini SUVs were particularly hard-hit, with month-over-month price declines of 5.7 percent and 3.8 percent, respectively,” Kontos said in the report.

Year-over-year, however, 12 of the 15 segments in ADESA’s analysis showed price growth. The largest was for full-size vans (up 16.3 percent), followed by full-size pickups (up 9.4 percent) and midsize SUVs (up 9.1 percent). The three decliners were compact CUVs (down 3.0 percent), mid/full-size CUVs (down 3.3 percent) and sporty cars (down 1.1 percent).

By segment group, car prices were up 1.6 percent year-over-year and down 2.9 percent month-over-month; truck prices jumped 9.3 percent from July 2013 and fell 1.8 percent from June; crossover prices fell 3.1 percent year-over-year and dropped 1.4 percent month-over-month.

Kontos delved into auction price trends among seller types, as well, and detailed the implications of those movements for the remarketing business.

“Prices for used vehicles remarketed by manufacturers were down 1.9 percent month-over-month and down 4.7 percent year-over-year, indicating weaker demand for high off-rental program vehicle inventories,” he said.

“Prices for fleet/lease consignors were down 0.9 percent sequentially but up 2.2 percent annually, though prices for off-rental ‘risk’ units within this segment were down significantly,” Kontos continued. “Dealer consignors saw a 2.9-percent average price decrease versus June, and their prices were flat relative to July 2013.”