Same on our work place as well , I think the search option is too prominent in the home page , I guess too much work for the user. The buy option to view the most recent ads would be really welcomed. (Though as davy mentioned the same functionality can be get by an empty search . )
Highlighting the filtering feature on the home page , I think the site loses it's X-factor. When we had the buy button there was always chance to see something interesting on the adverts.
if someone wants to filter the ads they can do on the buy page . And Images looks distorted ?
My two cents