I would have a very hard time storing any of my machines in a shed. So many have been stored like that and it takes a dedicated person to restore the damage the climate does to these little beauties. Some can be brought back, some can't. Why spend the time, money and effort to collect and then basically put them outside.
If modern machines can't be stored that way (& cold weather would KILL my bernina) why would you put a senior citizen into an uncontrolled environment? Just my opinion.