1Place potatoes in 3-quart saucepan; add enough water to cover potatoes. Cover and heat to boiling; reduce heat to low. Cook covered 25 to 30 minutes or until potatoes are tender; drain. Let stand until cool enough to handle. Cut potatoes into cubes.
2Mix mayonnaise, vinegar, mustard, salt and pepper in large glass or plastic bowl.
3Add potatoes, celery and onion; toss. Stir in eggs. Sprinkle with paprika. Cover and refrigerate at least 4 hours to blend flavors and chill. Store covered in refrigerator.