Value-wise mine pales in comparison, but since the thread is asking for 'memorable,' how about this experience from 1980? Every single card inside a wax pack I opened was the same, #230 Dave Winfield. All of the other packs I opened that day from the box at the drugstore were normal, but what an anomaly. A stack of fifteen (I think that's how many cards were in a pack back then) Winnies in the same wax cage. What a shame it wasn't filled with Rickey Hendersons! Oh well.
Here's a pic of an old binder still containing the lot (and others)...
1980winfields1.jpg