Yep, Rsteenoven said it. The Snowball is a great mic. I use it and so do many other brickfilms. I also hear the Snowball iCE is good, but it doesn't have the switches on the back. I'm not sure of quality differences though. I'm pretty sure that Squid uses the iCE and it sounds great.

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"Whatever you do, do all to the glory of God." - 1 Corinthians 10:31b

Eehh ok, I guess it's not terribly cheap. But it's one of the cheapest you can really find that has good quality. At least, as far as I know (I'm not terribly versed in mics to be honest).

I've personally used this mic before, and it's got good sound quality also: https://www.amazon.com/CAD-U37-Condense … B001AIQGUO

You probably won't find a good mic for twenty dollars or anything, you have to invest a bit. iPhone mics aren't terrible, to be honest, so if you're in a squeeze and need a mic and have an iPhone, use it.

I'd recommend the iCE also since I've heard it (but not used it). The only difference between it and the normal snowball (besides the price) is that is records only one mode, the equivalent of Mode 1 on the Snowball, meaning that it picks up vocals decently well but not much else. However, from my use of the Snowball, I don't like the Mode 1 because it seems muffled, which is why I can't completely recommend it.

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"Whatever you do, do all to the glory of God." - 1 Corinthians 10:31b

If you're willing to spend around $70, I'd recommend the Audio-Technica ATR 2100. I'm not quite sure how it would directly compare to the blue snowball, as it is a different type of microphone (it's dynamic, not a condenser).

Fancypants uses a similar mic (a Samson Q1U, I believe) in his videos.

I've got the Samson Q2U, and it's decent, it's got a fairly neutral sound, and does what I need it to.

If for some freakish reason you already have a USB XLR interface, Andrew Huang did a review of This Mic
and it was surprisingly good. (don't try to use it with the included 3mm cable as the sound will be bad)

I've used (and like) the zoom H1 as well, but I wouldn't necessarily recommend you go out and buy one for brick-filming unless you want to make your own ambient sounds, as the stereo XY pair of mics isn't the best for recording a single voice in a studio (i.e. bedroom), they're better suited to location sound recording.  It has however been indispensable for recording peoples lines or instruments in places where I couldn't/didn't have more complicated/larger equipment.

“But the enterprise in which I’m about to embark on is fraught with imminent peril.”

I bought the Snowball iCE, refurbished, and a pop filter for about $50. No regrets. The power cord does have a tendency to come loose, but that's a minor defect for such a great product.

Buying refurbished is a great way to go in my experience, and something I'd suggest looking into, because you generally get the same quality product for less than it would cost brand new.