Yeah when I started mining, each ZRC was worth 75 cents USD. Given that you get almost 4 ZRC per block mined, I thought I was raking in about $3 USD per block. It's fallen waaaaaaay down in value since then, but not enough to where it would be pointless to mine. That's why I would recommend prospective miners spend some time on cryptsy every time before mining to try and get an idea of what their coins will be worth and to evaluate and see if the money they're spending on power consumption is worth the amount they're making. For me, the answer was no until I saw that pools are starting to form. I was tired of seeing my computer run all day at 90 Celsius and not see a single coin for my trouble. Now that there are pools going to where I could earn at least SOMETHING for the work I put in, I may get back into it.