Simple. Post your Case Closed or Detective Conan merchandise.
I'll start:
DVD Collection
Use to own the original season sets and the individual releases for movies one and two, but sold them. I purchased the Viridian sets and movies back last year.
Manga Collection
Have all the volumes released to date. Once I get around volume 43, I'll be able to showcase all the volumes horizontally, and I can't wait! 
Some of you may know that I owned the Complete Color Works, 5 & 10 year anniversary movies guides and the Decipherment of the Conan books, and well... I had to sell them. So now the above pictures are my entire Conan collection, unfortunately.
Nice I have all that you have plus the Game called Detective Conan and Kindaichi the meeting of two great detectives.(sadly I can only read a little Japanese)
DVD/CD Collection (I never double dipped, except for the first volume obviously):
On the crazy off chance anybody wants to see the pics I took for this in glorious 3D let me know I guess, they looks much better that way. And yeah... I know the CD's are bootleg.
Owner of this dead place http://s1.zetaboards.com/CaseClosed/index/
That's what's up!!
http://save-case-closed.webs.com/
http://www.facebook.com/pages/Save-Case-Closed/234820129881980
http://twitter.com/#/SaveCaseClosed
Hey Rannen, it's ManyFaces. Long time no see. Nice collection, but did you have to buy bootlegs? Most of those collections can be found on CDJapan, and while they're more expensive than bootlegs, at least you're supporting the series that way.
その名は・・・ 名探偵コナン!
Sono na wa... Meitantei Conan!
His name is... Detective Conan!
ohh I'll post pictures later. But my dvd collection is lacking. I've got 2 movies, and only 2 seasons. I do admit though I have around 5 single dvds. My manga collection, I have every volume except 14, 15 and 32? I think. And I even have some stuff I got at fanime. I got a conan key chain and a conan calendar.
Lets do it all again
Oh hi ManyFaces, thanks. Yeah I had to 'cause I didn't know, whatever site I ordered from years ago probably listed them exactly the same, they're replicas and just as satisfying to own for me. Besides if you're saying the "real deal" CD's support Detective Conan, and Detective Conan magically supports Case Closed, I don't think that matters. I just decided to join and take those pics to participate, not really support anything. This sunken ship is going nowhere, my friend.
Owner of this dead place http://s1.zetaboards.com/CaseClosed/index/
Well, no pictures. But I have seasons 4 and 5. 4 Individual DVDs, two movies, 16 books, a 16 pc mini figure set. Three plushes, and 2 action figures( one Sherlock Holmes attire, and other is normal). Then one hand puppet.
名探偵 コナン!!
case closed manga 1-7 movie 1,3,5, volume 1 of season 1 volume 2,3 of season 4
Your brain is from outer space