There are two auctions of 4x4 vehicles taking place this month:
Civil Aviation Authority (CAA) is auctioning a few Pick Ups (Nissan, Toyota, Mazda) and a few Suzuki Potohars at Lahore. The Auction date is around 21 August I guess
The Army is auctioning some of its Land Cruisers, Potohars, and Pick Ups. It is also auctioning some cars and bikes (Mercedes, Coronas, and 125 cc motorcycles). The auction would take place at the Ordnance Depot at Golra, Rawalpindi on 22 and 23 August perhaps.
The correct dates can be confirmed from The News of Sunday, 5 August.