You had asked for others to post about the details of their collections.
First, you must have one of or The Most Rarest Collection in the Campbell world -- a signed "Death Valley" 45 is unheard of, much less the other signed rarities in your collection. Holy cow!
You were blessed to have met Glen in person so many times and also to have discussed his recordings (and collectibles) with him. Those moments are priceless, aren't they?
Unfortunately, I can't answer your question with details.
Back when the Internet came to be, one of the first things I looked up was "Glen Campbell Discography". I found a simple chart online that someone had compiled of Glen's album titles, and I started to use it as a sort of check list to find out which albums I had yet to find. (I still have that chart...it's amazing to see how many (great!) albums Glen released since the early 90's.)
Then, Wikipedia came online and, at some point, I discovered long-time Glen Campbell Fan Richard Price's outstanding Glen Campbell Discography, the genesis, I believe, of the discog'y now on Wikipedia. I imagine Richard may have worked with you (and Hair? KOA?) on this project? Then Cowpoke?
Richard's list included both LPs and singles, so I copied and pasted it into an Excel spreadsheet that became my "Glen Campbell Database". I kept the hyperlinks in the spreadsheet so that I was able to link from the XLS to Wikipedia to view album tracks and other details. (At some point, the hyperlinks no longer worked; I think Wikipedia changed URLs or something or maybe album pages were moved on Wiki's site.)
I used this XLS as my new checklist. When Glen released a new album or DVD, I added it to the worksheet. (Singles were listed on another worksheet.)
At one time, I had time to cross-check between Richard's titles and the titles I already had and the new titles I was purchasing/am purchasing, avoiding duplicate entries.
Then...I got busy with other things including the GC Forums, and I just starting inputting anything I had bought or had received to the spreadsheet without cross-checking--and ended up with duplicates--my entries and Richard's.
Different formats are pretty much on one line or row ("Ghost On The Canvas" - LP, CD, mp3) unless the album was a special release with extra tracks ("Meet Glen Campbell").
So, when I look at the number of rows now, the number of rows is inflated. Got to clean up this worksheet for sure, 'cuz right now I have no idea of a total number!
The discography spreadsheet includes radio recordings on vinyl and similar releases.
The singles worksheet is more manageable. I probably have about 75 vinyl singles (excludes those singles released on cassette or disc such as "Postcard From Paris"). This number includes some duplicates and also includes a couple of Glen's Uncle Boo's singles on the "Dee-Light" label.
Also, I generally don't collect the singles (or albums) on which Glen plays as studio guitarist; just cannot afford "to go there" -- with few exceptions such as "Sagittarius".
I still have some singles with Glen singing the vocals yet to find. Also, I am not a "completist"; I have one Ceneco single, that's enough for me (as well as one Crest, one or two GA Challenges, one Kaybo, one Capehart, etc.).
My fav 45s are "Guess I'm Dumb" (because I am both a Brian Wilson & Glen fan); "Death Valley" (took me years to find it at a price I could afford and in excellent condition); "100 dollars pour un sherif" (aka "True Grit") on a French label and with a picture sleeve; and super thoughtful gifts (such as a Dutch picture sleeve/rare 45) from friends/relatives.
The treasures in my collection are the "Ghost On The Canvas" vinyl album and the "Ghost" CD Glen signed for me when we met up on the 2011 Goodbye Tour, but not so much because these items are signed, it was the precious time I spent with him, the first and last time I met Glen when I was an adult and no longer a swooning, tongue-tied teenager!
Thank you so much for all you have contributed here to the Forums, Ar, and also for your tremendous contributions to documenting Glen's extensive discography and for your kindheartedness in sharing this information!