Nothing really expensive, but I had a Nikon Lite Touch AF 28mm f3.5 compact disappear that I wished I had back.
I got it free and love it, haven't found anything similar. I've though about a WTB on here or trade, I've got a few pre-AI Nikkors I would part with in a trade for one. I loved it, was a great 35mm compact walkaround when I didn't feel like carrying an SLR. I could literally fit it in my pocket.