I am both a machine collector, and record collector:Jerry B: I've always considered myself as a machine collector although I own a good many records. As a machine collector I always consider two things, the degree of rarity and the condition of the machine.
Regarding Machines: Best to me is - The most pristine, as close to NOS that I can obtain. Rarity, (except when it comes to purchase price, or resale value), is secondary. I am just as happy with a pristine common model, as I am with a pristine rare model. Somehow I feel that I get a bit of the same excitement that the original owner had when he/she first brought it home.
Regarding Records: Best to me is also pristine NOS, or lightly played Excellent condition records. I try to imagine how the original owners enjoyed hearing their records for the first time. When I do come across "rare" records that are in less than optimal shape, I tend to trade or sell these off, so that I can obtain better condition records.
Bob S.