Just to add a different angle to this thread, there are people who are just collectors, if it wasn't records it would be something else. There are people who come into my shop and buy plastic kits, and they have rooms full of unmade kits which they admit they will never have the time to complete. That's a collector.
I have never been a collector, and can't understand the need to own every record that was made on a certain label, but these people have made a great contribution in saving the history of black music, so I'm very grateful to them. I could never do it.
To me it's all about what's in the groove, and I would love to have a small box of my favourite 45's, but my finances mean that's just impossible.