Sigma SD14 DSLR lens question?

Hello, all.

I have been given a Sigma SD14 DSLR, body only. On craigslist I see numerous Sigma DSLR lenses for sale listed as Canon mount, Nikon mount, Sony mount, Minolta mount, etc, but none listed as having a Sigma mount. Do the Sigma bodies use a mount compatible with any of the major brands, or is the 'bare' lens, without the brand specific mount, what will fit my Sigma body?

Thanks,

Richard