They are talking about 03/04 SVT Cobras, not the new Shelby GT500. I had an 03 Cobra and bought it in 04 with 115 miles on it for 26500 (they were $33k-$34k new), so I think I got a great deal. Then I spent 1500 on intake, catback, smaller s/c pulley and a tune and made 466 rwhp & 472 rwhp. If you want a car that you won't have to worry about the engine untill you reach large amounts of power, the cobra is the car. It also handle pretty well for a car that heavy, it has an IRS and not a solid rear end so the handling is there, you just have to learn how to launch off the line differently than with a solid axle.
However, I had to get rid of the car because my knee is bad and the clutch was too much for my knee at the time. I got a Lightning for a short time, and now I just picked up an 2006 Evo IX. The IX really is a sweet car. I like it a lot, and i like it even more than my 2004 STi. The handling is intense and the power is pretty good once the turbo starts spooling.