Wanting to get my first classic computer

Hello all, I have been a student of computer history for years but have only learned how to use classic machines vicariously through emulation. I would really like to get my own classic computer but I don't know where to begin. For one, I am on a very limited income and two I don't have a lot of space and finally I don't have much knowledge on the finer points of the older hardware i.e. terminals networking, etc. I would really like a Vaxstation but I have also considered a '90s workstation such as an SGI Indy or a SparcStation. I am pretty fluent in both VMS and Unix so any of those would work. So where do I look besides e-Bay? I see some available here but none near me. I'm in the Detroit area. Any advice would be appreciated. I do know that I do now want a Mac or old PC. I would like something more exotic. (Although it might me neat to own a Rainbow.) Thanks Ray