Hmm.......If the build is all over the place it's probably better to part (If it's good stuff). My preferred method is sticking it in it's appropriate box if it's good stuff and holding it for a rainy day. But then again, I think most stuff is good stuff.......I guess that's why I have so much stuff (mostly junk). Better not listen to me!
Seriously though. I'd just sit down and do the math........Complete bike = X amount of $ against the projected price of the frame and components separated and sold individually. There is the hassle of labor to remove, clean and listing the stuff too......
Case in point:
I can get $150 for a complete ridable crappy bike boom ten speed all day long. The second I remove everything and clean it I get $50 for the frame and can't sell most of the parts (lesson learned). My fancy pants Italian bike on the other hand is a whole different story. Campy this, Modolo that, Cinelli, Galli, Omas, etc........Best believe I will get more for it parted than complete.
Long story short.......Depends on the cumulative value of said parts (including extra labor) versus the value of the complete bike. Tough call. Like to gamble?