Many commercial impact wrench Ingersoll-Rand & Chicago Pneumatic. Some worth 8600$ US each! Size 3/4", 1" and 1 1/2". Work like new. 
INGERSOLL-RAND 3/4" ($250) CHICAGO PNEUMATIC 3/4" ($300) --- INGERSOLL-RAND 1" ($1000) CHICAGO PNEUMATIC 1" ($900) --- INGERSOLL-RAND 1 1/2" ($1800) CHICAGO PNEUMATIC ($1500) 
Possibility to buy the complete lot!