If you are looking for a hasselblad set up i would probably go with the 500cm, WLF (waist level finder), or a prism finder, a12 back, and a 80cf lens.
For the finder. I prefer using the WLF as that is they way that i like to work. If you like looking into a view finder, i would go with the NC2. It is a very basic 45 degree finder.
The 80 lens is the normal lens on a 6x6 camera. So if you like shooting a 50 on 35mm format, the 80 is for you. If you like shooting longer or wider then normal you still have a lot of choices in lens. Like the 50 for a wide and a 150 for a longer.
A second on that. The 500cm is a good intro to medium format shooting (the elm or elx is better suited to commercial work: noisy, heavy and best wedded to a tripod). If you take a liking to the Blad system you can expand your system, as suggested, to the holy triumvirate of the 50/80/150 or, if money is less a concern (or interest warrants) to the 50/80/120M/180). Extra backs, of course, are always a good investment - and relatively cheap.
That's what I meant with a few "dings". It's around 375 US dollars, from a reputable shop, not ebay. Supposed to be in good mechanical and optical condition. The 80mm f2.8 C Planar T* lens is the exact same price.
Note: The Hasselblad pictured above has a good deal of wear on the camera body's metal light seal ridges. This is caused by improperly seating the film backs on the camera. Find a camera that is has not been used in this manner! There should be little or no wear on the lower left and right corners. The camera pictured may leak light. Always check for this kind of wear and tear.
There's a big difference between a little scuffed paint and raised aluminum ridges that are worn flat. It's common for users to slap the backs on and slide them into position rather than to seat the metal feet of the camera body into the back and then hinge the back into place. I would want to inspect any camera body personally before paying $400 or so. It's just one point to examine when buying a used Hasselblad.
Ideally, you should get a 30-day optical/mechanical return privilege with any camera you buy from a reputable source. That would give you time to try the camera and have a repair person give it a once-over for you. I would recommend a tuneup for any Hasselblad purchased used unless the seller certifies it's had a recent checkup. A qualified technician will tell you what shape it's in. A Hasselblad is a precision instrument. It's more like owning a Porsche than a Ford. Plan on occasional maintenance for camera body, lenses and backs, depending on how much you use them. They're great cameras, and I love mine. With care, they will last many years.