Cheaper Sram mechs - I've got a three and a half year old SX-5 mech that's still going strong.
Mavic rims - both my heavier (EX721) and lighter (XC717) going straight and true despite gung ho approaches.
Marzocchi forks of the pre-Taiwan era. I have two pairs of 2006 forks both performing flawlessly with no maintenance at all.
Another UN52 bottom bracket and deore square taper crankset - three years old again.
If you bear the weight truvativ howitzer bb - mines 4 years old, been in four frames two of which were unfaced and has absolutely no play in it.
Hope QR seat clamp - both of mine support my 95kg bulk nicely.
FSA Pig - forgotten hold old but still on original bearings with minmal fettling. I think anything that gets in is just ground to dust by the huge lower bearings!