When you turn on the key make sure CEL(check engine light) comes on.
Test 4high and 4low
Look at clutch and brake pedals, see if they match the miles
Call Ford Dealer in closest town and ask how much for a Used Car inspection, usually $100-$150.
After the test drive if you are still interested, ask if he would mind if you paid to have Ford dealer inspect for $150, it's good if you know the price.
You don't need to do it, although it is worth while, you are mainly looking for his answer.