you should source some of those options outside of bat, i think you will find some better prices. sounds like you really don't need the performance of the konis. sounds like you should just go with the cheapest, most reputable setup. The way i see it, you should be able to buy springs for 200 and struts for 400 hopefully with shipping included or not too much more. As for the shop doing the work, you should ask them the same questions your asking us. $170 is a fair price, but like you said if it suddenly becomes, "oh you have this problem and that problem so it's $300" that would suck. As for replacing other suspension components it depends on how much money your looking to spend and how long y ou think your gonna keep the car and how many miles you will put on it. Even though the car only has 49k it is still 4 years old going on 5 so some of those things may need replacing but it's probably not critical at this point. IF you put 15k miles on it per year and drive it another 3 years you will be at the point where the [censored] resale value wont justify pouring a lot more money in and fixing the nitty gritty wont increase the value enough so you will just sell it as is take what you can get and moveon to the next car.