Keep in mind that 7500 hours is the equivalent of 375,000 miles. Like mlb said in the winter they idle for weeks on end. As far as value it would all depend on what kind of shape they are in. Some company's on the slope drive around a little and take good care of things while others use the crap out of there trucks and basically trash them. I am sure for 2-3k you could not go wrong since you could part them out for that. If they are in good shape I doubt 3k will win the bid. I have been to a few Alyeska auctions and it always amazes me how much they get for there old wore out trucks.