You made a business decision instead of a gambling one. In that context it works. The first time I bought a CP I opened it and said, "God, were you stupid!" and I never did it again. But I still sold the silly Jawa Gram!
Yeah, I got some "Nice Try" Jawa gram and Darth Malak's jaw casing in my first pack, I wanted a derelict purple eviscerating crystal. Didn't get it in the packs I got with the CC's I had but made enough cred's selling the junk I had no interest in to buy what I wanted, so in the end it worked out for me. I've bought a few different collection pieces off the GTN now, I like that there's stuff there that I can get now.