That's a good attitude to have, I don't intend to sell ANY of the saws I have bought specifically for my collection, but it makes me feel good to know that I'm not upside down on any that I've bought........ yet.
The biggest thing is what their intended purpose will be once you have them, some vintage saws like mcculloch 7-10a or 10-10a, poulan 245a, Homelite super xl, are all good saws for cutting firewood and having fun and making noise all at the same time. I enjoy these saws because they are old but have great power to weight ratio as well. But if you are going for super odd stuff or stuff that are more collectors items them you'll find the big, bulky, heavy, odd design, or odd manufacturers will be up your alley. Acresinternet is your friend, I sometimes get on there and look through models and look at specs of the saws and if I find one that peaks my interest I will look for pictures on google, then I take to ebay to see how easy they are to find. But keep in mind, prices on ebay aren't always gospel, and I tend to take them with a grain of salt.
Can't remember if I was telling you or someone else. I have a bar with .500 chain and part of the case for this saw or one that's very similar.
Wow that is an interesting design! I have seen that site reference a lot and use it every time I see a saw model I've never seen before. It's definitely a little overwhelming to see all the different manufacturers and then hundreds of the different models of saws.
