Well, when I got the shaved ice lamp, I didn't know it was rare and unorderable, so I sold it. But when I played the gamecube animal crossing for the first time, I didn't know what those leafs were for (Yeah I know its kinda stupid lol) And I was so surprised when it turned into a piece of furniture in my house XD
Edit: Also, awhile after playing acnl. I put the resetti surveillance thing in such an awful spot and thought it wouldn't be seen that much since there was a tree kind of it front of it, but now the tree is gone and Olivia lives a few spots ahead of it and the resetti surveillance is now in the middle of my path to my retail. (I didn't have a path when I bought the resetti surveillance though)