It looks like he fork is bent, but maybe it's just a trick of the camera angle. If the fork is bent, that knocks the value way down. I'd get a picture from a different angle before trying to sell it online.
This looks like a 1981 model. I like the Blueline components, but they don't have the prestige of some other SunTour groups. My understanding is that Vitus 888 is a basic CroMo tube set. Again, good but not special. I'm going to guess a value of around $200, but it would depend on your local market.