How much should I pay

I wouldn't pay anything for it other than scrap price, cause that's all you will have. They really shouldn't let those back on the roads.

it all depends on the condition and how much you like it - the true value of the vehicle has been depleted because of the salvage title, but if you like it pay what feels good to you - you could always use it for parts later to build a better one without a salvage title