Fortunately, My nano wont allow for some of the more expensive livestock out there, that and I tried to stay with easier corals and fish so far...
I've lost only ~$80 in livestock. Here's the story if anyone is interested...
Lost all my fish in less than a week after ~3 months of no problems (missed a feeding and a large hermit decided that my "trained" mandarin would be a good meal alternative, then one of the main pumps failed cutting off the RDSB and nitrates spiked off the charts, stressing the two clowns I had to death. Now been running inverts only for ~2 months. As for corals I only lost a few mushrooms when their frag rock was knocked upside down by a hermit... (was at the lake that weekend)
Will definitely not be buying hermits when I get a larger tank.
Sorry for the long winded post...