Notice that the price was marked down from $62.980 haha
Unfortunately, DrGP is right. As of 2011, used car market prices have been high in general (not just with the s4).
Has to do with the economy...three years ago (~2008-2009), there was a decrease in new car sales and leases. As a result, there are now less used cars on the market, along with more people keeping their relatively new cars. Not to mention more people wanting to buy used (since traditionally, its financially savvier).
On the flip side, new car prices, as we've seen with the s4, are actually quite low (relatively speaking). Most owners here were able to get close to invoice prices.
To put things into perspective, few weeks ago, I saw a nicely equipped, CPO, low mileage (~5k), 2010 prestige for 50k (one of the more 'reasonable' prices I've seen). Probably MSRP would've been 60k (using the Audi website as a reference). From posts I've seen, people probably could've custom ordered one exactly to spec (new), for as low as 55k, depending on incentives, negotiating, etc.
So in the end, you are talking about a 9% price difference on a 3 year old car! Could you make the argument that 5 years later, if sold, the now new 2012 car, with 1 buyer, newer MY, x miles on it, and full warranty (at no extra cost), would be worth as little as 10% more than its now used counterpart after the same 5 years? I think so...
(P.S. Car was sold a week after the ad went up haha)
Anyway, after looking at the used b8 s4 market for months now, I'm realizing a used CPO may not be the smartest thing if the prices don't go down.
Maybe this will change in the summer, when the 2013 (facelift) model comes out, or maybe by the end of the year, when more s4 leases end and more used cars, in general, are available.
That or you will be able to get an even better deal on a new 2012!