My advice would be really short and simple:

stop.

You can launch exactly once. It doesn't matter if you are feature complete. But it does matter if you're consistent.

You are building an e-commerce site of sorts, so reputation is really your only real currency. The site right now is confusing.

Fix it! Now. Don't promote it any further than it has gone already, repair those things, make it clear and consistent and then make your push.

Also, you should probably yank all the dummy auctions (or at least the stuff that looks like a dummy auction) (a poorly drawn giraffe ? a floppy disk ?) because they degrade the profile of your site.

I realize you guys are of good intentions but you are making a poor first impression. You only get one chance at a first impression.