WIth SLRs I dont understand why people want old SLRs. Yea it looks cool but considering "for example' an ELAN 7s and similar are pretty much perfect and have autofocus old SLRs are a not fun. Manual Focusing on most 35 slrs is a pain.
I use film primarily to slow down my photography and only secondly for the look and feel. Therefore a manual SLR is a must for me. If I got a modern SLR with program AE, AF and auto advance I could just go with the "newer technology" I am not allowed to talk about in this forum. Rangefinders on the other hand are just not my cup of tea, so it's down to old SLRs.
Everyone defines their photography for themselves. People are dipping film into coffee, I would never do this, but I can understand people who are doing this.