How much for stock 350 heads?

[PHOENIX]

A friend of a friend apparently has some brand new heads, he bought through a magazine. Apparently he aquired these illegally (dont ask). Anyway he cant use them because he bought the wrong application. He is trying to get rid of them and all I get for an answer is "brand new, stock 350 heads". He only wants $170-$180 for these heads. Im gonna look at them and see what they are exactly I dont know if they are GM, Edelbrock, or something else. Just curious if you guys could give me an idea of what stock new GM 350 heads are worth. I will try to find out exactly what they are soon (brand and model #). Im hoping they are a performance heads of some sort.