i am going to check out a b18b nonvtec stage one crower cams for $160 tomorrow. the guy says he had it for about 6 months. it this worth it? and how do you tell what stage they are? the cams have the crower marking on it but that only tells me that it's made by crower. please help.

 

just did some seaching and from what i've read the marking should be on the end of the cams.