Ok guys, I need a little advice from Isuzu owners. Im getting ready to purchase a box truck for my mowing and fert business. My dealer has 2 1999 models to choose from. One is gas with 116,000 miles. I can get that one for $11,000. The other is a diesel with 138,000 miles and I can get that one for 13,900. The diesel looks a little better cosmetically but other than that, they are in about the same shape. My concern with the gas is the mileage and fuel cost. The concern with the diesel is what if it breaks...I know they can be really expensive to repair and their maintenance cost is higher. So, which one??