Do you have any particular location requirements? Your profile says you are in Texas, so if you want a provider out of Texas then there are quite a few, it is just a matter of weeding through the offers to find the right one.
You want 1U colo, roughly 3A power and 10mbps unmetered for $30?
I'm sorry but you simply won't find that. The power alone is going to cost the provider $30
You are absolutely right, but I think OP just looked at the power rating of his server (power supply), probably it won't use more than 1 AMP.
And 10 Mb/s unmetered - unless somebody will oversell a lot (quality will be low) - not real price at all.
OP has to be more specific, like 300W, but really what amperage would be and how much really bandwidth will be used - then price could be calculated much easier, than now and probably it won't be $30 anyway. But if somebody will offer that price - I wouldn't feel comfortable with the power/network infrastructure of the hoster.
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There are a few colo providers that don't put power requirements on there single server collocation so that's not even a problem. But I don't know if your going to find it that cheap. There are providers however that are in the $50 /month range that offer specials and discounts that might help.