Nice and clear design!
However, I have some remarks regarding New Listings block:
1) You should modify your item's title shortener.
"BlackBerry Cell Phon..." does not look good.
I understand that there are not much place for text, so I propose you two things:
a) use "…" (html code
…) instead of "..."
b) shorten title by words, not by characters
for example: "GIO Electric Lawnmower…" instead of "GIO Electric Lawnmow..." and so on.
2) (somehow corellates with 1):
Add
title tag to both item's image and link. This will give to me (as a user) possibility to view detailed information without necessity to click on each item.
3) When focusing on the second row of items, it is unclear who is the seller. See attached image:

Do you see? It is not clear, for example, who is the seller of nVidia GeForce - Scott or Jonathan.
In this case I would recommend you:
a) to move line with seller and price slightly up
b) increase vertical spacing between items
So, the final look of New Listings block with all my remarks will be the following:
Good luck with your site!