I can e-mail you 3.05 or 4.00 (only the free editions, of course).
I'm most interested in 3.12, followed by 3.11, followed by any 2.xx version. I searched the Internet for 3.12 and 3.11 and couldn't find them. All the pages that listed them as downloads actually sent the file for 4.52.
I'm interested in 3.12 because I used it before and I THINK it could edit files in 24 or 32 bits (whereas 3.05 is limited to 16 bits). Version 3.12 seemed almost like my beloved 3.05, except it was sluggish with copying & pasting, so I wasn't interested in it at the time. However, if I ever want to try pro recording, the extra bit depth might be desirable. And I'd prefer 3.12 to any of the 4.xx versions because I've tried 4.00 and 4.52 and they are INFERIOR to 3.05. The worst is 4.52!!! I can't believe NCH took a beautiful program like 3.05 and f-ed it up. Version 4.52 can do a few things 3.05 can't, but who cares when 4.52 is so much worse at its fundamental task: SOUND EDITING.
If you don't have 3.12 but have 3.11, I'm interested in 3.11 because it is listed as a bug-fixed version of 3.05. Well, we'll see. And for all I know, maybe it can do 24 or 32 bits too.
I'm interested in 2.xx versions out of curiosity. I wonder if there are some things the oldest versions can do better. With NCH, newer certainly doesn't mean better...
If you send an e-mail through this site it will go to my regular e-mail address (I don't want to list my e-mail here because I don't want it to show up on Google or anything). After you contact me we can exchange files.
Thank you