How much could i get a Dodge Viper for in the u.k. 4/5 years old

Between £30,000 - £40,000.

Why on earth would you want a poorly built LHD plastic car with leaf springs and a drive train out of a truck?

the viper does not have leaf springs. why would not you want to get one? is there a more manly car? the noise it makes is insane, torque is mental, and there is not a lot that will touch it. and if something does come along that will, you've got 8300ccs to play with. it is quicker than a 911 turbo, gt3, and Audi R8.