Hi Wanabe,
Take your time as the prices vary widely.
Second hand cars are anything from $35k to any price.
$50k assures something decent.
Unlike most cars each Cobra is individual and that can be both an advantage and a disadvantage.
One extreme is a car that has had more money spent than what the car is priced at, whilst the other is a car that you then spend a further $10 to $15k fixing.
Remember one thing there are no limits with these cars and you can soon empty your pockets into the snake pit!
Decide what you want - looks, performance, reliability (important) or all and then go searching.
You are a limited comodity (someone with the dosh who is willing to spend it on a Cobra).
Good luck mate
Oh and auto's aren't to bad - from one who knows