You got talent for this, I hope you continue to write more parodies because this was far better than most noobie attempts. Two minor notes though (as one of the veterans here I'll exercise the unwritten rule that old farts can call 'em as they see 'em).

a) The pacing in the verses are excellent, so why did you add extra syllables to the chorus line? The shorter "When on Ebay, I'm THE buyer!" would have been in juxtaposition with the original and the rest of the parody just as well.

b) The verse that starts with "Foster's famous homemade brew" should not have been repeated, even when so in the original it's four times oughta five better for the parody to rewrite the originals repeat different the second time (and third, and fourth) if alternate (but still pacing) variations are possible, and in a list parody like this they almost always are. By doing so you're showing the audience that you are smarter than what the original song's lyrics writer was on the day he/she wrote it and could't come up with variations.