As for the local craigslist ad, I just wanted a clear dish just to tinker with. Besides it would be too cool!!!!
C band will be a good addition. I've had a C band dish setup for a few years now and there's much more on C band than Ku.
What sats are you aiming at with the multiple LNBs? I have a fixed dish pointed at 95W and one at 97W, I'm thinking of trying to get these two onto one dish. I also have a fixed dish aimed at 121W and one at 125W, would be nice to combine those two, but I don't know if they're too far apart to do it though.