Not talking about rares, cause that's a never ending quest. Name like one or two you just can't seem to find. This may be for players who've played for awhile and please don't say SOJ. For me it's Gskin and a Tarn. lol. Those two have eluded me so far. Sets are fine for examples also. Trades don't count, self-found.
The only thing I couldn?t find for a while was a Tarnhelm ( even found a SoJ ). Then I traded for one, only to find one a few runs later. I don?t know, if I found all uniques or sets so far, but I found the ones I needed.
I have personally found some pretty rare "uniques", such as hotspurs, and gulls.
a couple of gskins, silks, scads of the easily found set items, rattlecages, twitches, scads of shards, gravenspines, umes, and even a couple +2 tri resist nec wands.
I have been in games where someone on my /f list nabbed a soj that has fallen approximately 12x in the past 18 months, but never managed to get one myself.
semi-recently found a perfect rclaw to go with the 7, or 8 I have scattered across mules and characters in progress (ray explained that it was a perfect one - does one more point dmg, but still no where near as good as the prepatch ones)