Larry Stedman wrote:

(snip)
In any event, what's the best $100 that YOU ever spent on this hobby?

And why?

Larry Stedman
Vestal


Paying $100 to become a sustaining member of the Mount Wilson
Observatory Association (MWOA)

It gives me four nights on the 60 inch telescope and invitations to some
of the most interesting astronomy lectures around.
It gives me access to the observatory, which is steeped in history and lore.

Matthew Ota