I just added the 10,000th comic to my collection, and it was the Miracleman: Golden Age hard cover collection by Neil Gaiman and Mark Buckingham.
I would have reached this milestone before now, but I’ve sold off or gave away portions of my collection over the years, not to mention there was a time in the 1990s that I was only getting 4 or 5 comics a month. Still, wow, 10,000 floppies and trades! I guess I’ll never want for reading material. :)