ViperJon is right, you can find a 2005 Corvette for $30k these days (and owners who were the first to buy C6s when they came out back in late 04 paid $60k ordering them). How's that for depreciation?
To find a Viper at that price, you need to look at a "common" model like a 1994 RT/10. 11 years older and they are the same price? If you want to look at the economic side of ownership, there is no value proposition in Corvettes. Rarity... just over 25,000 Vipers produced in about 17 years. There have been over 100,000 Corvettes produced in the past 3 years.
If you are in decent shape and have a strong left foot, I don't see a problem with the Viper as a daily driver. You will get more joy out of your commute each day to work than a Vette. Complaints about heat... turn on the A/C. If you are really worried about the car getting scratched, etc... have the entire car clear wrapped with 3M. Well, not the side sills though, hahaha.
Lastly, another thing that makes no sense that I have pondered in the past: Some people say if they bought a Viper, they'd be worried about it getting dinged, scratched etc. Why should that apply to used Vipers and used Corvettes, because if you were able to acquire them at a similar price range, what difference does it make? Sure, repairs might be a little higher on the Viper, but that's about it. I think the real reason why one would be more worried about the Viper getting dinged or scratched is because it is a far more AWESOME piece of machinery, to the point of evoking/forming emotions. The owner would feel like they have let the car down if it is damaged. If you look at cars in that way, you have no choice but to GET THE VIPER. You owe it to yourself.
Vette's have terrible resale values.
So many out there, you can pick your car out of a thousand for sale in the color you are looking for.