just bought new ones for my 03 cobra, the chrome 4 bolt ones, and I think they cost me $225. So I would think anything under say $150 would be a steal as long as they're in good shape.
Not sure on the 3 bolt version but it should be a bit less (the 4th bolt on SN strut towers really matters as I recall. MM has info about this on their site).
I havent come across 3 bolt versions so I'm not sure what to say is a good deal.
Well they are coming off of an SN. So Im assuming that they will fit fine with no problems. And i am not doing any road racing I just need them to get my C/C right, so they will work fine I think.