Why is the Nikon D60 SLR Digital Camera so cheap?

Why is the Nikon D60 SLR Digital Camera so cheap?

Because it's long outdated. It's not even available new anymore and hasn't been for several years.

Because its long been discontinued and is very outdated as far as technology goes.

The D60 is the third incarnation of Nikon's compact, user-friendly entry-level SLR line that started back in 2006 with the D40 (which replaced the first Nikon 'starter' model, the D50). The original D40 was a hugely important camera for Nikon and can be given a lot of the credit for the resurgence in Nikon's fortunes at the volume end of the SLR market (which had been totally dominated by Canon since the launch of the EOS 300D / Digital Rebel). The D40's success (which continued long after the D40X made its swift appearance only 6 months later) isn't hard to explain; it was keenly priced, nicely designed and built and capable of excellent results. It was also a camera that proved cameras do not sell on megapixels alone (even at launch its 6MP resolution was far from 'class leading').

Because its an discontinued and outdated camera. There are many new cameras in the market nowadays so every 6 months you will find some cameras to be outdated.