Yes, they're still out there to be found. This is Victoria 1883 2d Mauve, SG211c, mixed perf 12 and 12½, catalogued at £750 used. However, this one is mint, which according to Stanley Gibbons, is unreported. Mixed perf means that on the same side of a stamp, the perforation gauge changes, due to the use of two different perforation combs. In this case, the vertical perfs are standard 12½, but the horizontal perfs change from 12½ to 12 at the O of Victoria. Of course if stamps aren't your thing, this is geek gobbledegook, but to philatelists it's a big deal. I paid more than I wanted to (C$361), but if it is what it appears to be, this is an exceedingly rare item and will do very, very, well at auction