Just out of curiosity, I checked the classifieds and I couldn't find any '98s going for under 50. I think you could get a high-mileage car that cheap, but I doubt you could find a babied low-mileage car for anything less than 55. It looked to me like the range was around $50K - $60K for a non-ACR, non-heavily modified GTS. For under 50K, I would personally be wary of collision damage, or else cars that have been run really hard.
In 2 years, of course, it could be a different story altogether. I took a look at what I could get out of my car versus what I could trade it for, and I've decided to stop worrying about the value of my used Viper and to just drive it until it falls apart. (That way, I should maximize my fun-per-dollar, which to me is the real investment).
A