1994 Ford Ranger Cost and should I replace ground wire?

EVERYTHING has been replaced on the truck - alternator, battery, serpentine/timing belts, spark plugs & hoses, water pump, sensors. You name it. However, the car still cuts off at will (not while driving) but at least 3-4 times a month it will not start back up until it's ready (sometimes a min - hour - week). I've had it diagnosed - they can find nothing. Someone said it might be an electrical or ground problem? How much can/should this run me. Does this seem like an accurate diagnosis? The car was hit pretty hard a while back and I'm wondering if I should cut my losses and sell or take to an automotive electrician? Thank you - I REALLY love my pickup.