The crows nest bell from the Titanic on exhibit in London in 2010. The owner of more than 5,000 artifacts from the ship plans to auction them off as a group in April. NEW YORK (CNNMoney) — The owner of more than 5,000 artifacts recovered from the Titanic intends to auction them off in April on the 100th anniversary of the sinking of the famous ship. But don’t expect to be able to bid on any one item from the ship. The artifacts will only be sold as a single lot, according to a filing by Premier Exhibitions (PRXI), an Atlanta-based company that now exhibits the artifacts at various locations…