You can find the rules on trading fairly early on in the forum rules. Please read the rules if you have not done so. To assist further, the specific rules regarding trading are as follows;
No For Sale or Wanted ads! (includes free gifts and loans of equipment) - this includes transparent or oblique references to equipment for sale or equipment being sought - sometimes this will be a judgement call. ALL links to, or mentions of, equipment For Sale will be moderated.