Citing Amstat data and its own estimates, Jefferies said the year-on-year drop was 33%, with heavy business jets leading the way with a 38% decline. But available inventories continue to shrink, falling 27 percent year-on-year for aircraft less than seven years old. At the same time, prices increased by 20%.

The latest market survey from Jefferies shows that 673 used business jets were put up for sale this month, up from 660 in July but down from 1,008 a year earlier. Available inventories account for about 2.7% of the active fleet, including all models, including older ones, and below the annual average of 2.9%.

In proportion to sales, stocks of heavy aircraft fell by 38% year-on-year, while stocks of medium-sized aircraft decreased by 33% and light jets by 31%.

As for aircraft under seven years old, the Dassault Falcon’s available inventory has decreased by 50% compared to the same period last year, with eight business jets now on sale. Bombardier’s inventory fell 39 percent year-on-year to 50 aircraft, with Global’s business jets down 59 percent and Learjet’s down 41 percent. According to Jefferies, the Global 7500 is not on sale.

The number of used Gulfstream aircraft also fell 38 percent year-on-year, to 36 business jets, representing just 1.9 percent of the fleet. The fall came as G550 stockpiles fell by 12 aircraft and G280 stockpiles dropped by eight.

It is followed by Embraer with a 14 per cent decline in inventories compared to last year, with the number of Cessna Citation down 12 per cent.

Prices have generally stabilized since July, but are still 20% higher than last year: Bombardier used aircraft prices rose 29%, Embraer 26%, Cessna 21%, Gulfstream 19% and Dassault 5%.