Before I had the knowledge, passion or wherewithal to get involved with pinball, my wife and I came across a Midway Space Gun at an antique store in Spokane Washington in 1995. If I recall correctly, the store was asking $800, and I remember offering them $400, which they accepted.
The good news is that the only thing I had to do to get it operating was to replace the stylus spring. So it sat in our basement in our small house in Spokane and amused us until 1998 when I moved to the Bay Area for work. We didn't expect to stay in California forever, so my sister agreed to store Space Gun at her house.