It's a Chinese copy of a Pentax K1000, but metal as opposed to plastic as a lot of cheap copies are. In other words, it's a decent copy of a very good camera, and should be reasonably reliable and take perfectly good photos with a good lens. It'll take Pentax K-mount lenses, which are widely available pretty cheap second-hand. Basically it's fine as a student camera, although for more reliability I'd personally recommend looking for a used Pentax instead, especially if it comes with a Pentax lens as this is likely to be better than the one on the Vivitar
Just out of interest, what are you planning to use it for and how much are you thinking of paying for it?