Items to sell:
1. The example is mandatory, otherwise the topic will be sent to the recycle bin
2. The specify of a contact method is mandatory.
3 .BUMP-ing can be done once every 24 hours, otherwise the user will receive a warning.
4. Only the author of the topic can BUMP it.
5. The subject that doesn't recive a message in 5 days will be marked as resolved and then closed.