I'd have to agree that he didn't get the best price, but its not a rip off..
I was paying $85 for my alignments. I tried other places but (some cheaper) but I found that the place that cost me more up front cost me less in the long run. The alignments would hold much better when I got them from the $85 place (it was the tech I used, not the shop)
Buying your own bushings and installing them is easy IF you know what size to get. If you get your alignment checked so you know how far off you are and know what size bushings you already have you can buy the right size and install them.
At $200 for a alignment (including bushings) I'd start to say its over paying.. $150 just isn't a great price, but IMHO its not an overcharge either especially since prices vary so juch depending on the size of town your in, what part of the country your in and how many alignment shops there are in town.
~Mark