Regarding the weight of a 4X5 Norma, see my post #10 here:
http://www.largeformatphotography.info/forum/showthread.php?99497-Sinar-Norma where I give the weight of my Norma with lens as just under 8 1/2 pounds. I weighed the lens and lens board separately and get a combined weight of 3/4 pounds. So the Norma without lens and board would weight approximately 7 3/4 pounds. The weights for the Sinar F series I'm finding online are 3.3 Kg for the original F and 3.6 Kg for the F2. The original F has a reputation for weakness where the front standard clamps to the rail. Maybe this is nothing to worry about if the knob is tightened with care, but it could be an age related issue with the plastic used for the clamp. The clamp for the F2 is supposed to be much improved, but the F2 tends to be more expensive than the F. Anyway, this is a long way of explaining why I would choose a Norma, since there isn't appreciable weight difference compared with the F-series.
The possible drawback to a monorail style camera such as the Norma isn't so much weight as the bulk, the overall size. If you intend to hike much distance with your camera or you use trains or buses a lot when you go out photographing, you may find the size of a monorail to be inconvenient. However, most of the small fold-up technical camera don't allow extension rails and bellows to be added for using long focal length lenses or for macro photography. If you think you want to use wife-angle lenses a lot, or long focal lengths for portraits, I think the Norma would be preferable to most technical cameras. For wide-angle use, the Norma can be set up with just the 6 inch long extension rail, making for a more compact camera.
If you look at eBay Worldwide Sold auctions there have been some Normas sold recently at what look to be really good prices. A Norma with 3 lenses sold yesterday here in the US for approx. $725 including shipping. A couple of Normas sold there in Europe for less than $400 US, one included a lens. The European prices may be a reflection of the value of the Euro to the US dollar. I was shocked to see the exchange rate today seems to be one Euro equals $1.09 US. The last time I looked, probably more than a year ago, the Euro was more like $1.39 US. Quite a difference.
The lenses included with the outfit you are looking at likely date from the era of the Norma. So the Symmars probably aren't the later Symmar-S design. Not to say they are bad lenses, some people even prefer the "look" of the earlier lenses, but they probably aren't worth as much for resale as more modern lenses. You should probably do an eBay Sold search for Symmar and Super-Angulon to get an idea what actual selling prices in Europe are.
The real unknown is the condition of the Norma you are interested in. It would be nice if you can examine the camera in person, especially to check the bellows for pinholes.the slow speeds on the shutters, do all controls lock down tight, and is the fine focus smooth for both front and rear standards. If all the shutters need to be cleaned and lubed, that will add a fair amount to the cost of the outfit. In reality the shutters may be usable at faster shutter speeds so you can use the camera and decide which lenses you tend to use most, then have just those shutters cleaned. Definitely get an idea what a shutter C&L may cost you in your location.
I hope I don't sound overly negative. I do love my Norma, but realize it isn't the perfect camera for everyone. I wish you the best with your decision.
Len
