When I was buying this stuff, around 150 bucks ea. was the going rate.....that was 4-5 years ago.
If you're buying, watch out for bent struts.
I had one(Bilstein for my 914) but didn't know it till the alignment guy told me that he couldn't get it to come into spec. Another on my ex 73 911 (Koni).
Both were stuck at -1.5 deg and wouldn't get more positive.....they worked fine, tho. What did I know?
Now I'd kill for a set of bent ones that worked properly.