MagaFlow #4 Acrylic Sump W/valve. Some sell for over $500 Here's a link
http://www.overnightpetsupplies.com/us/015905190152-megaflow-sump-filter-model-4.html
Selling for $100 or trade for the following fish
1. Large Australian Harlequin Tusk, or
2. Med. to Large Sohal Tang, or
3. Med. to Large Purple Tang, or
4. Large yellow Tang, and Large Clown Tang
http://www.overnightpetsupplies.com/us/015905190152-megaflow-sump-filter-model-4.html
Selling for $100 or trade for the following fish
1. Large Australian Harlequin Tusk, or
2. Med. to Large Sohal Tang, or
3. Med. to Large Purple Tang, or
4. Large yellow Tang, and Large Clown Tang