You can buy a big old block of cheese there pretty cheap. Don't know how safe it is though as i stopped eating it after finding suspicious looking dark curly hairs in it.
Veges are cheap too, and they're pretty safe if washed & cooked in clean water...
Flying safety? Don't hit the volcano... and make sure you land on RWY36 "LEFT"...
Why Goma? It's a bloody long way from yellowknife...