Disc brake pricing?

I'm currently collecting parts while my dart is getting its body work done. Since one day I will actually complete my project Im trying to track down what I need to convert from my 9" drums to BBP discs. My question is whether or not I should jump on these or not, so far I have found

A complete BBP disc setup, all freshly rebuilt and painted with new ball joints and hardware, everything except rotors and upper arms - $275

Set of both upper control arms, new manufacture/aftermarket w/ ball joints and bushings - $150

Are these good deals? From what I've been seeing this is only a little bit more than it would cost me to pull them from a yard and refurb all the parts myself.