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Terry,
As far as "gettable" spectra of weird objects, without too much stress, I was thinking along the lines of exotic objects such as Blue Compact Dwarf galaxies and some phenomena near the centres of galaxies such as starburst regions and Active Galactic Nuclei. The visible-wavelengths surface brightness is high in these objects, so it ought to be possible for amateurs to get a spectrum.
I recently (last year) discovered a Voorwerp (an intergalactic
emission-line emitting cloud that is lit up by - hypothetically - AGN activity in a nearby galaxy), but this might be really hard to get a spectrum of.....it is barely visible on Digitized Sky Survey on the internet!! I found lots of other unusual things in a two month period when I was exploring GALEX far-ultraviolet imaging of galaxies (I was doing this, literally day and night, about 20 hours a day, but then the typical amateur pattern of being distracted by something else, happened)
cheers,
Robert
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