360 is the best "value" buy you can get in exotic cars at the moment.
I will actually play devil's advocate with that statement as I don't think the 360 is the best value at the moment, it is still too close in price to the 430 and the upgrades in the 430 are by in large well worth it. For roughly a 25% bump in price you can get a F430 and if you own the car for more than 2 years the depreciation difference is going to help make up that cost.
I would consider the Gallardo to be a stronger value, especially next summer when the Huracan starts pushing lots of used Gallardo's on to the market. Then of course you have the heavily discounted Lotus Evora which is a solid car that never found a market, but then we are starting to talk about all sorts of different "exotics" rather than just the major marquees (for example the NSX, which remains a better value than the 360 due to be roughly 40% cheaper).
As far as value Ferraris go though, I think the 360 has a way to travel down the curve before it truly becomes a "value". Right now a good 348 or 355 (cross your fingers on maintenance) are the value Ferraris as they are pretty much sitting on the bottom of their depreciation curves.