I have been raising fish and corals for many years. I also have received more help and expert advise from fellow members than all the books I have read. One complaint - I have experienced, on several occasions, a fellow hobbyist will tell you they will be over your house to purchase something you are selling at certain time and never come. Also, someone agrees to sell you something and when you try to set up a time and location, they never return your correspondence. I get that someone has placed a better bid, but at least let the other person know that your not interested. I have also heard other members complain of the same problem. Nothing wrong with letting someone know that the item was sold or they no longer want to purchase what you are selling. Common courtesy.