I have an aunt that said for every penny he spent on restoring antique tractors she could spend the same amount on her green cherry blossom depression glass hobby. She has a full set (enough to set the big table for holidays) and has extended to collecting other things as their fleet of Allis Chalmers grew. Since their retirement I believe they have all the tractors they want, but she still spends-from they years before her equal spending started.