I am interested in this auction, in a recent auction, the exact same levers went for $128. Those had the hoods but I was still shocked at the price. I don't think the brakes you posted will go for much more than the listing price (I could be very wrong though). Here is that first auction:
http://cgi.ebay.com/ws/eBayISAPI.dll...EWA:pIC&ih=018

As to "should you get get these because they were original to the bike". It depends. For me, I am terribly obsessive compulsive. My bike also originally had Ballila brakes and when I was building it up I bought a pair of Universal brakes because they were available. Later, when some Balillas were available, I bought them and they are still in my parts bin. The Universals are better brakes and are period correct for the bike so reallly, only I know (until now) that the brakes are "technically" incorrect.

I probably will never sell my Balillas but I am contemplating a new build where they could be put to use.