"I have lists of hundreds of albums I cannot find anywhere"
I guess you have tried Soulseek? There is a linux (nicotine) and an OS X client (ssX) availible. I have found it to be the best place by far to look for obscure music. You might have to give the search some time though (days) since the user who has the music you want has to be online for it to show up.
And Gemm is a good, although sometimes a bit expensive, place to find second hand Lps and Cds.
You are half correct. As I understand it:
Healthy people under normal circumstances regulate their breathing based on CO2 since CO2 will rise well before significant decrease in O2.
People with COPD instead regulate based on O2. They are insensitive to CO2 from having had high amounts in their blood for a long time. This is why you have to be careful giving them oxygen since it might downregulate their breathing and cause CO2 poisoning.