Philately is similar to fine art - it is the satisfaction, appreciation and understanding that count. In general, collectors have a special interest in rarity. Perfection is not the only big thing in collecting stamps, quite the opposite, freaks and errors also generate equal if not more interests.

The picture above shows a Labuan stamp with an inverted centre. This is basically an 8 cent postage due stamp of 1901 issue, with CTO mark on top right. Reportedly, less than 40 of such stamps exist, with a catalogue value (SG D6ba) of £ 9,500. It is currently auctioned in an auction house from US and has a bid of $6,500.