I am by no means an expert on this, but I have been watching the 911 market for a while. I have three hypotheses to explain this current auction...
First, the entire market is out of whack. Period. There have been some interesting ideas put forth on various forums, such as low confidence in the "traditional investments", mass-media attention,and etc to explain the increased interest in classic cars. I can say with all the confidence allowed by an anecdote that a combination of these factors recently led to my sister, who never thought of a car as anything but transportation, to ask about 1) the cars I have/had and their current and projected values and 2) if she should buy something to stash in the garage. When my sister is asking about something, its gone completely mainstream.
Second, the bidders in this auction need to do their homework or they know something the rest of us do not. The '65 model year holds a special place in 911 history: it is the first full production year. But, the first 232 are the real special ones (at least according to those that own the first 232). These include the car previously known as the "901", which was put to a quick end by some legal action by a particular French company, and the 911s made in 1964. The car in question is not one of these. However, if the selling values of 911s continue on their upward trajectory, the buyer/restorer of this particular car could make a reasonable amount of $$ when its done.
Third, in three words: auction funny business. I have had no direct interaction with the seller, but he has a long and storied reputation for being "difficult" which has kept me from contacting him on the occasion that he advertises something I want. You can search "Sheridan WY and Porsche" to see a sampling. Actually, I am surprised that BaT featured this auction since they previously featured his "Porsche stash sell-off" which was a bust. In classic hoarder fashion, he has been known to make deals only to back out after the prospective buyer has made the journey out to Wyoming. He has been caught using different user names to support his online reputation, to generate interest in his sales, and to hide his identity as the seller. He is banned from several forums and is constantly changing his ebay ID. These things do not give me confidence in the validity of this auction.
Having said all of this, I really wish the prices of cars would go back to a reasonable level so that I can start my own future barn find.