Lots of things. P basses, J basses.. I guess fender basses. There is this whole 'you have to have one' but the P is like the Harley Davidson of the bass world, iconic, clunky and not that great The jazz is better but not that much. But yet I keep wanting a Jazz, buying it, realising it has too few strings to be useable and getting rid of it.
Effects Pedals - they all basically do the same thing don't they, but they all have faults or are too expensive, or you just don't have the space for them
Small mixers, like the flow 8 - too small and restrictive to do anything with, maybe unless you were keyboard players, with not many keyboards
Iconic bass guitars - they are no better than the others, they just cost more and noone can tell the difference without using their eyes