Wow! For the price, that is a GREAT starting point! I'd actually probably buy one myself and replace/sew up the zipper if I weren't a sz 2. But since I can make things...I usually feel very blah in a costume if I buy it.
How fast did it get there, though? ... You know. JUUUUUUUUuuuuuuuuuuust in case.
Oh, trust me, we would much rather build than buy anyday - feels like cheating to us! We just don't quite have the sewing skills to do, say, a form-fitting stretch bodysuit. I'm going to be adding some of the bias-tape-looking details, like the bit that goes under the breast and down, at least, to add a little bit of accuracy.
OK, so we ordered the suit from the seller called "sexylingerie" something, and there was initially a slight issue with the shipping - HK post sent it back to them or something like that. I upgraded the shipping (from free to $14, which isn't bad from HK to the US) just to be safe, and had them re-send on the 12th, and it arrived today, so, 6 days using upgraded "EMS" (their word) shipping, which on our end at least was UPS. Communication with them was slow, though, due to the time zone difference, so there was a couple days of email back and forth before that could happen.
EDIT: yeah, I just noticed you said you're a size 2, so there would likely need to be alterations. Wife says it would probably be loose on a very thin girl. Might negate some of the value proposition on the price, then, I suppose, but you've got the option!