That's why I clarified above. I'm not a collector in the way I think of them. Collecting and saving in an airless room or something. Most of the stock numbers I got were from
here including info on the books that weren't printed. Other sites included the
wikipedia and a site with reviews and such of the 1st and 2nd edition books (can't find the link right now). I just compiled them in to my list to make it complete as I stumbled upon them. I also updated the lists on rpg.net. Part of finding the lists and filling out the lists on the 6th world wiki and rpg.net's index game me a complete list of all the publications related to Shadowrun.
It's one of those things that sort of snowballs. I listed my books on rpg.net with an intention of selling the game stuff I don't use any more (like 2nd ed D&D, Megatraveller, etc). I found other folks lists on the 'net and updated mine. I updated rpg.net's Shadowrun list and added theirs to my list. I found 3rd ed books on ebay which due to them being bundles filled in parts of my "collection" and ultimately I look up and I have almost a complete set of books. The FASA 3rd edition BBB was one of those bundles. I really didn't expect to get it and only bid to get the two magazines and the 3rd Ed rule book. Luck of the bid I guess.
As it is, I started out as just looking for the 3rd Ed books. Many of the comments here suggested it was the best edition to run. As I got to the point where I only needed a few books to complete the list, I figured I should at least try to find the last few. Over the past few months I've kept my eye out and am now only a couple books away from a complete "collection". I fully intend on using them in my games (another reason I don't think of myself as a "collector").
Then I'm reading threads here and find out the novels are good background material for the adventures and sourcebooks. I have several of the earlier books already so I went and picked up the rest.
I guess all of this means that I am collecting the books and such, but in an effort to have a complete game setting. When I ran D&D many years ago, I created my own setting so all the history and inner workings of my campaign were well known. I'm effectively running in someone else's world now so I think it behooves me to have as much knowledge about it as I can in order to run a good game.
For example, in 2053 Seattle, Renraku's financial auditor is Sato. A member of security is Alice Crenshaw. A well known prime runner is Hart. She's an elf that typically has Tessian the feathered dragon as an assistant. Some of the runners in Seattle that might be available are Dodger, Ghost Who Walks Inside aka Ghost Maker and an Ork named Kham. A drink that's available is Fizzygoo. Another Seattle company is United Oil.
In a Seattle run for example, I can introduce well known folks as "random encounters" and already have a good understanding on how they'll respond to a situation and still maintain continuity.
One of my intentions for my web site was to create a character database for similar situations. Where folks (like you) can retrieve known runners for background in games. You'd also input your own characters along with a brief history. Then others can use your characters as background and maybe even allow little updates to your characters as they encounter other runners.
I don't know. I don't think of myself as a collector. Other opinions may differ. I hope it's not a problem

I just like to be complete.
(And I drive them nuts here at work as I dissect how things are running and create documentation. I don't like working on my systems without all the information.)
Thanks for the info. Hope I didn't bore you with my message
Carl