A body in great shape and it's kit lens (the 50mm) was usually worth about $125. They'd commonly be sold to people in a college photography class. But anymore, classes that teach film and darkroom development and printing are fairly rare -- so now there aren't necessarily even many college students that would buy it. That'll make it much more difficult to sell.
I own the same camera (mine was heavily used... but still in great shape), but I keep it for nostalgia. I don't actually shoot with it anymore.
The camera would have come with the strap & kit lens. It would not have included the 28mm, 70-150, 35-105, or the other accessories such as the flash, winder, teleconverter, etc. The challenge with these is that it'll be tough enough to sell the camera, much less find someone willing to pay for the camera with the extras unless the value of the bundle is a really good deal. It's probably easier to part out the extra lenses and accessories. The value of any extra lens or accessory will depend on it's brand & condition (e.g. are these all Canon lenses & accessories or are there 3rd party items in here?) For example... Canon made a few winders, but there were many 3rd party makers of power-winders. The same is true for the flash, teleconverter, and lenses.
I think I paid about $100 for my used Canon FD 35-105mm f/3.5-4.5 lens. It was in pristine condition, clear optics, and no signs of wear.
The flash and winder require batteries. HOPEFULLY those accessories were not stored with the batteries installed. If so, the battery may have leaked and severely damaged the items. You'll need to check for that.
Lenses stored for long periods of time can develop molds and hazes on the optics depending on your climate and how they were stored. The value of a lens is highly dependent on it being in good mechanical condition as well as being optically clean.