There are presently two bikes that I know of on ebay that have full
50th anniversary gruppi on them. The first is a pristine Colnago with
starting price of $1000 http://tinyurl.com/
The German seller is the rather 'original' fellow who has a decided tendency to lay the praise on very heavy. He has also subverted quite a few auction prior to their natural conclusion to be able to get his money quicker, so be aware and don't think about sniping.
Surprisingly, neither frame is actually from 1983 and they were therefore either retrofitted or mounted when the gruppo was already old. If a gruppo on its own goes for just over one grand on ebay, it will be interesting to see how these two complete bikes sell.
Steven Maasland
Moorestown, NJ