Well heck, we don't even know what year that truck is or what options and accessories it has. You say the asking price is $43K, but we don't know what you'd be buying. Absent such basic and essential information, it is impossible for anyone to answer your question.
To truly evaluate this truck, go back and...
- Ask if maintenance records are available
- Ask how many owners the truck has had
- Ask if the truck has been used for work
- Pull the dipstick, look at the color of the coolant, and look at the color of the brake fluid to visually assess whether the truck has received adequate maintenance
- Measure tire tread depth front and rear. If there is a measurable difference you can be reasonably certain that the tires have not been rotated adequately. If something as simple as tire rotations haven't been done you can make conclusions about how well the rest of the truck has been cared for.