How, if at all, do you guys track your collections? I am a spreadsheet nerd, so I try and keep a listing of every book I own (including duplicates) with the box it's in, the year, publisher, grade and OSPG values. I also try and keep the price I paid for the book (even if it's an estimate), and I try and keep track of what I sold the book for (if I ever do so). I'll save you the time...I'm a nerd. But, I love numbers. I know that I have 112 issues from the publishing year 1964, and I have 413 issues of the Amazing Spider-Man, and I have more issues of DC than Marvel (by only 53 books). 4,547 issues overall. I love keeping track of where the holes in my collection are, etc.
I assume I am not alone, but anyone else out there worse than me?