Selling on multiple sites:
You are welcome to list your items for sale elsewhere at the same time as you post on AmiBay. However you must state in your thread that the item is 'available elsewhere'.
You are welcome to post links to your sales on other sites, however links to auction sites can only be for fixed price 'buy it now' items offered at the same price. Ensure that you check the rules on cross-listing on any other websites that you may also be using, as it may be against their terms and conditions to list in multiple places. If you are in any doubt please contact a member of staff for help.