I think most people miss the ever increasing difficulty factor.  I've paid as much as $20 and as little as $5 for block erupters.  I have 100 cranking away along with some Blades.  I've made my investment back but now that I'm in the profiet area the difficultly is so high I'm making 45% of what I was just six weeks ago.

I wonder what I could get for a 100 stick mine turn key?