After 80,000 miles my mechanic says the struts on my 97 SC-2 are shot and that both front and rear struts need to be replaced. The cost of this job, he estimates will be little over a grand and that includes a four wheel alignment. Before I go ahead with this can anyone tell me what if any are the tell tale signs of struts being shot? Forgive my ignorance but what exactly do struts do? Also if possible supply any links to cheap on line parts site. Thanks for any help.