Was it driven by just one or few drivers?
Not every company can afford to give every driver their own assigned vehicle. Smaller companies will of course have fewer drivers. But if it was a larger organization the flatbed truck might have ten different drivers operating it every week.
Some people are naturally better drivers than others. Some people drive work vehicles worse, some better, than their own personal vehicle. The more drivers the flatbed truck had, the more likely it wasn’t driven in the proper way. Some people race the engine and some slam on the breaks.
Be leery of purchasing a flatbed truck that had ton different operators driving it.
Was it used locally or across the country?
This is another thing for consideration. Vehicles run on local routes are operated differently than those used for long hauls. Find how it was used, often the type of business with give you all the clues you need.
Local most likely means it was in constant stop and go and in high traffic areas. But it probably didn’t run at too high of a speed for long stretches of time. Long haul means less stopping but was most likely running at a higher rate of speed for a more consistent amount of time.