Looking good - lots of colour.. like the thumbnails on the home page. The buy/sell page has a header that is orange which is great (on the table) but the black diagonal lines going throug it im not much of a fan of..
overal I like it, not much bad to say - Im a fan of lots of bright colours on websites and you have nailed it... and easy to navigate.
It's simple, cool and attractive. I like it very much.
I just don't like the diagonal lines color is too bright. Maybe you can reduce the opacity for it.
And for the Login area, the user name and password box is go off from the login table ( I am using Mozilla Firefox). Maybe you can expand the width of the table in the login area.