title: Creating a custom post type with custom fields
body: <p>This is my first wordpress site.  I am creating a local community site and I want to have similar functionality to freecycle, that is users can offer things to other people for free. So they'd need to be a drop down box to say if the thing was a wanted or an offered item. A title field for the name of the item. Then details of the item. Upload an image of the item and a location field, where people have to pick it up from. Also possibly a contact number field.  Plus ideally, I'd like a checkbox system so that if the item was offered to someone the user could tick a box saying offered and then the post would maybe get assigned a category of awaiting collection and the text of it go grey and disappear out of the list of posts.  When it was collected, they  could click another box which would then give it a category of archive.  I don't even know if any of this is possible though...</p>
  
  <p>If it is though, how is the best way to do this? Considering I want to be able to use these posts on other areas of the site e.g. in a sidebar showing most recent items offered. I also want to be able to add a minimised version of the form which will sit in the sidebar of certain pages, so the user can add an item whilst on a different page.</p>