We know you can't turn back the clock, but we wouldn't mind returning to a time when full-size pickups were simple, stripped-down, work-duty affairs, and they cost less than a large sedan, and we called them "half-ton" trucks.With the average price of a basic, no-frills full-size pickup creeping toward $40,000,we don't even need to debate whether the cost of entry has gotten too high. New trucks are simply too expensive, and we're holding onto our old pickups for longer these days, even if that means spending more money to keep them running.