If you want to increase sales you need 3 things at least:
1) Redesign the website: This is something you should have done years ago, look at your competitors (I really do mean this in a friendly way although it might not sound exactly like that :D )
2) Update your website more frequently! A website does not look updated by it's forums! It does look updated and fresh through its design and content updates from the business owner
3) Get more social (you know, facebook, twitter, youtube, google+, pinterest etc...)